NET9 SDK select in build

Signed-off-by: Tomasz Maruszak <maruszaktomasz@gmail.com>

Author: zarusz

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 8.0.x
+          dotnet-version: 9.0.x
           cache: false
 
       - name: Restore dependencies