try specific dotnet version to avoid weird bug in the latest release

Author: Havunen

.github/workflows/ci.yml

@@ -19,8 +19,8 @@ jobs:
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: | 
-           6.0.x
-           7.0.x
+           6.0.316
+           7.0.307
 
       - name: dotnet build
         run: dotnet build