Updated .NET SDK

Author: teo-nikolov

.github/workflows/github-actions-tests-on-windows.yml

@@ -9,10 +9,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: Build
+      - name: Setup .NET 9 SDK
         uses: actions/setup-dotnet@v1.7.2
         with:
-          dotnet-version: '8.0.x'
+          dotnet-version: '9.0.x'
       - name: Clean
         run: dotnet clean
       - name: Install dependencies