Update README

- Remove mentions to preview library versions.
- Remove mentions to preview fw images.
- Remove instructions to use preview nugets.

Author: josesimoes

README.md

@@ -11,19 +11,12 @@
 | Component | Build Status | NuGet Package |
 |:-|---|---|
 | nanoFramework.M5Core | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.M5Core.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5Stack/) |
-| nanoFramework.M5Core (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.M5Core.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5Stack/) |
 | nanoFramework.M5Stick | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.M5StickC.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5StickC/) |
-| nanoFramework.M5Stick (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.M5StickC.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5StickC/) |
 | nanoFramework.M5StickCPlus | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.M5StickCPlus.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5StickCPlus/) |
-| nanoFramework.M5StickCPlus (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.M5StickCPlus.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5StickCPlus/) |
 | nanoFramework.M5Core2 | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.M5Core2.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5Core2/) |
-| nanoFramework.M5Core2 (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.M5Core2.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.M5Core2/) |
 | nanoFramework.Fire | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.Fire.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.Fire/) |
-| nanoFramework.Fire (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.Fire.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.Fire/) |
 | nanoFramework.AtomLite | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.AtomLite.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.AtomLite/) |
-| nanoFramework.AtomLite (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.AtomLite.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.AtomLite/) |
 | nanoFramework.AtomMatrix | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.AtomMatrix.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.AtomMatrix/) |
-| nanoFramework.AtomMatrix (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_apis/build/status/nanoFramework.M5Stack?repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.M5Stack/_build/latest?definitionId=52&repoName=nanoframework%2FnanoFramework.M5Stack&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.AtomMatrix.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.AtomMatrix/) |
 
 ## Usage
 
@@ -37,40 +30,40 @@ These NuGet packages provide a support for M5Stack products:
 - [Atom Lite](https://docs.m5stack.com/en/core/atom_lite)
 - [Atom Matrix](https://docs.m5stack.com/en/core/atom_matrix)
 
-> Note 1: Before trying to add NuGet packages to your projects and/or before flashing the devices (see next section) using MS Visual Studio (VS), open VS > Tools > Options > NuGet Package Manager > Package Sources  and make sure that it contains an entry pointing to <https://api.nuget.org/v3/index.json> , otherwise add it.
-> Note 2: When invoking VS > Project > Manage NuGet Packages make sure that in the Package source drop-down menu (right upper corner) "nuget.org" is selected. Also if you're using preview version the "include prerelease" checkbox should be clicked/selected as well.  
+> Note 1: Before trying to add NuGet packages to your projects and/or before flashing the devices (see next section) using MS Visual Studio (VS), open VS > Tools > Options > NuGet Package Manager > Package Sources  and make sure that it contains an entry pointing to <https://api.nuget.org/v3/index.json>, otherwise add it.
+> Note 2: When invoking VS > Project > Manage NuGet Packages make sure that in the Package source drop-down menu (right upper corner) "nuget.org" is selected.
 
 The NuGets bring support for the screens as well and require to be flashed with the proper image (using [`nanoff`](https://github.com/nanoframework/nanoFirmwareFlasher) dotnet CLI).
 On the examples below replace `COM3` with the appropriate number of the COM port to which your device is connected. (on Windows you can check this in the Device Manager).
 
 For the M5Core:
 
 ```shell
-nanoff --target M5Core --update --preview --serialport COM3
+nanoff --target M5Core --update --serialport COM3
 ```
 
 For the M5StickC:
 
 ```shell
-nanoff --target M5StickC --update --preview --serialport COM3 --baud 115200
+nanoff --target M5StickC --update --serialport COM3 --baud 115200
 ```
 
 For the M5StickCPlus:
 
 ```shell
-nanoff --target M5StickCPlus --update --preview --serialport COM3
+nanoff --target M5StickCPlus --update --serialport COM3
 ```
 
 For the M5Core2 and Fire:
 
 ```shell
-nanoff --target M5Core2 --update --preview --serialport COM3
+nanoff --target M5Core2 --update --serialport COM3
 ```
 
 For the Atom Lite and Matrix:
 
 ```shell
-nanoff --target ESP32_PICO --update --preview --serialport COM3
+nanoff --target ESP32_PICO --update --serialport COM3
 ```
 
 > Note 3: If the `nanoff` commands fails, make sure you have followed instruction from Note 1 above.