fixed link and updated to latest sdk

Author: niemyjski

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.101
+        dotnet-version: 3.1.200
     - name: Build Reason
       run: "echo ref: ${{github.ref}} event: ${{github.event_name}}"
     - name: Build Version

README.md

@@ -1,10 +1,11 @@
 # Exceptionless .NET Clients
+
 [![Build status](https://github.com/Exceptionless/Exceptionless.Net/workflows/Build/badge.svg)](https://github.com/Exceptionless/Exceptionless.Net/actions)
 [![NuGet Version](http://img.shields.io/nuget/v/Exceptionless.svg?style=flat)](https://www.nuget.org/packages/Exceptionless/)
 [![Slack Status](https://slack.exceptionless.com/badge.svg)](https://slack.exceptionless.com)
 [![Donate](https://img.shields.io/badge/donorbox-donate-blue.svg)](https://donorbox.org/exceptionless)
 
-The definition of the word exceptionless is: to be without exception. [Exceptionless](http://exceptionless.io) provides real-time .NET error reporting for your ASP.NET, Web API, WebForms, WPF, Console, and MVC apps. It organizes the gathered information into simple actionable data that will help your app become exceptionless!
+The definition of the word exceptionless is: to be without exception. [Exceptionless](https://exceptionless.io) provides real-time .NET error reporting for your ASP.NET, Web API, WebForms, WPF, Console, and MVC apps. It organizes the gathered information into simple actionable data that will help your app become exceptionless!
 
 ## Using Exceptionless