Fix .NET version mixup in instructions for building on Windows

Author: christophwille

README.md

@@ -45,14 +45,14 @@ How to build
 
 #### Windows:
 
-- Make sure PowerShell (at least version) 5.0 is installed.
+- Make sure Windows PowerShell (at least version) 5.0 or [PowerShell](https://github.com/PowerShell/PowerShell) 7+ is installed.
 - Clone the ILSpy repository using git.
 - Execute `git submodule update --init --recursive` to download the ILSpy-Tests submodule (used by some test cases).
 - Install Visual Studio (documented version: 17.8). You can install the necessary components in one of 3 ways:
   - Follow Microsoft's instructions for [importing a configuration](https://docs.microsoft.com/en-us/visualstudio/install/import-export-installation-configurations?view=vs-2022#import-a-configuration), and import the .vsconfig file located at the root of the solution.
   - Alternatively, you can open the ILSpy solution (ILSpy.sln) and Visual Studio will [prompt you to install the missing components](https://docs.microsoft.com/en-us/visualstudio/install/import-export-installation-configurations?view=vs-2022#automatically-install-missing-components).
   - Finally, you can manually install the necessary components via the Visual Studio Installer. The workloads/components are as follows:
-    - Workload ".NET Desktop Development". This workload includes the .NET Framework 4.8 SDK and the .NET Framework 4.7.2 targeting pack, as well as the [.NET 8.0 SDK](https://dotnet.microsoft.com/download/dotnet/8.0) (ILSpy.csproj targets .NET 6.0, but we have net472 projects too). _Note: The optional components of this workload are not required for ILSpy_
+    - Workload ".NET Desktop Development". This workload includes the .NET Framework 4.8 SDK and the .NET Framework 4.7.2 targeting pack, as well as the [.NET 8.0 SDK](https://dotnet.microsoft.com/download/dotnet/8.0) (ILSpy.csproj targets .NET 8.0, but we have net472 projects too). _Note: The optional components of this workload are not required for ILSpy_
     - Workload "Visual Studio extension development" (ILSpy.sln contains a VS extension project) _Note: The optional components of this workload are not required for ILSpy_
     - Individual Component "MSVC v143 - VS 2022 C++ x64/x86 build tools" (or similar)
       - _The VC++ toolset is optional_; if present it is used for `editbin.exe` to modify the stack size used by ILSpy.exe from 1MB to 16MB, because the decompiler makes heavy use of recursion, where small stack sizes lead to problems in very complex methods.
@@ -66,8 +66,8 @@ How to build
       - ILSpy.AddIn.slnf: for the Visual Studio plugin
 
 **Note:** Visual Studio includes a version of the .NET SDK that is managed by the Visual Studio installer - once you update, it may get upgraded too.
-Please note that ILSpy is only compatible with the .NET 6.0 SDK and Visual Studio will refuse to load some projects in the solution (and unit tests will fail). 
-If this problem occurs, please manually install the .NET 6.0 SDK from [here](https://dotnet.microsoft.com/download/dotnet/6.0).
+Please note that ILSpy is only compatible with the .NET 8.0 SDK and Visual Studio will refuse to load some projects in the solution (and unit tests will fail). 
+If this problem occurs, please manually install the .NET 8.0 SDK from [here](https://dotnet.microsoft.com/download/dotnet/8.0).
 
 #### Unix / Mac: