README: Recommend installing git instead of GitHub Desktop. (#71)

As the GitHub app doesn't add git to PATH.

Author: microbit-carlos

README.md

@@ -2,7 +2,7 @@
 
 [![Native Build Status](https://github.com/lancaster-university/microbit-v2-samples/actions/workflows/build.yml/badge.svg)](https://github.com/lancaster-university/microbit-v2-samples/actions/workflows/build.yml) [![Docker Build Status](https://github.com/lancaster-university/microbit-v2-samples/actions/workflows/docker-image.yml/badge.svg)](https://github.com/lancaster-university/microbit-v2-samples/actions/workflows/docker-image.yml)
 
-This repository provides the necessary tooling to compile a C/C++ CODAL program for the micro:bit v2 and generate a HEX file that can be downloaded to the device.
+This repository provides the necessary tooling to compile a C/C++ CODAL program for the micro:bit V2 and generate a HEX file that can be downloaded to the device.
 
 ## Raising Issues
 Any issues regarding the micro:bit are gathered on the [lancaster-university/codal-microbit-v2](https://github.com/lancaster-university/codal-microbit-v2) repository. Please raise yours there too.
@@ -11,7 +11,7 @@ Any issues regarding the micro:bit are gathered on the [lancaster-university/cod
 You need some open source pre-requisites to build this repo. You can either install these tools yourself, or use the docker image provided below.
 
 - [GNU Arm Embedded Toolchain](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads)
-- [Github desktop](https://desktop.github.com/)
+- [Git](https://git-scm.com)
 - [CMake](https://cmake.org/download/)
 - [Python 3](https://www.python.org/downloads/)
 
@@ -45,7 +45,7 @@ To omit the final output stage (for CI, for example) run without the `--output`
 # Building
 - Clone this repository
 - In the root of this repository type `python build.py`
-- The hex file will be built `MICROBIT.HEX` and placed in the root folder.
+- The hex file will be built `MICROBIT.hex` and placed in the root folder.
 
 # Developing
 You will find a simple main.cpp in the `source` folder which you can edit. CODAL will also compile any other C/C++ header files our source files with the extension `.h .c .cpp` it finds in the source folder.
@@ -61,7 +61,7 @@ To use it, simply copy the additional json entries into your `codal.json` file,
 If you are using Visual Studio Code, there is a working debugging environment already set up for you, allowing you to set breakpoints and observe the micro:bit's memory. To get it working, follow these steps:
 
 1. Install either [OpenOCD](http://openocd.org) or [PyOCD](https://github.com/pyocd/pyOCD).
-2. Install the `marus25.cortex-debug` VS Code extension.
+2. Install the [`marus25.cortex-debug` VS Code extension](https://marketplace.visualstudio.com/items?itemName=marus25.cortex-debug).
 3. Build your program.
 4. Click the Run and Debug option in the toolbar.
 5. Two debugging options are provided: one for OpenOCD, and one for PyOCD. Select the correct one depending on the debugger you installed.