Updated the version requirements for running the current back office (#…

…13940)

* Updated the maximum Node version supported

Building the current version of the back office is only supported on Node v16 and earlier so have updated the docs to reflect that.

* Updated the .Net and VS requirements

For v11 you now need to be running .Net 7 and VS 2022 so have updated the docs to reflect that.

* Apply suggestions from code review

Co-authored-by: Jason Elkin <jasonelkin86@gmail.com>

---------

Co-authored-by: Sebastiaan Janssen <sebastiaan@umbraco.com>
Co-authored-by: Jason Elkin <jasonelkin86@gmail.com>

.github/BUILD.md

@@ -27,7 +27,7 @@ If you want to run a build without debugging, see [Building from source](#buildi
 In order to build the Umbraco source code locally with Visual Studio Code, first make sure you have the following installed.
 
   * [Visual Studio Code](https://code.visualstudio.com/)
-  * [dotnet SDK v6.0.2+](https://dotnet.microsoft.com/en-us/download)
+  * [dotnet SDK v7+](https://dotnet.microsoft.com/en-us/download)
   * [Node.js v14+](https://nodejs.org/en/download/)
   * npm v7+ (installed with Node.js)
   * [Git command line](https://git-scm.com/download/)
@@ -72,7 +72,7 @@ When the page eventually loads in your web browser, you can follow the installer
 
 In order to build the Umbraco source code locally with Visual Studio, first make sure you have the following installed.
 
-  * [Visual Studio 2019 v16.8+ with .NET 6.0.2+](https://visualstudio.microsoft.com/vs/) ([the community edition is free](https://www.visualstudio.com/thank-you-downloading-visual-studio/?sku=Community&rel=15) for you to use to contribute to Open Source projects)
+  * [Visual Studio 2022 v17+ with .NET 7+](https://visualstudio.microsoft.com/vs/) ([the community edition is free](https://www.visualstudio.com/thank-you-downloading-visual-studio/?sku=Community&rel=15) for you to use to contribute to Open Source projects)
   * [Node.js v14+](https://nodejs.org/en/download/)
   * npm v7+ (installed with Node.js)
   * [Git command line](https://git-scm.com/download/)