Update microsoft/setup-msbuild to v2 (options see https://github.com/microsoft/setup-msbuild)

.github/workflows/build-ilspy.yml

@@ -32,7 +32,7 @@ jobs:
         dotnet-quality: 'ga'
     
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v1.3
+      uses: microsoft/setup-msbuild@v2
 
     - name: Install dotnet-format
       run: dotnet tool install -g dotnet-format --version "6.2.315104" --add-source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json