Fix for tests wf

Author: JunaMeinhold

.github/workflows/tests.yml

@@ -1,4 +1,4 @@
-name: Build and Test
+name: Build and run Tests
 
 on:
   push:
@@ -22,7 +22,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '8.x'
+        dotnet-version: '9.x'
 
     - name: Run tests
       run: |