forcing 6.0.x framework to be installed

Author: MongoCaleb

.github/workflows/dotnet-core.yml

@@ -15,7 +15,9 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 7.0.203
+        dotnet-version: | 
+          6.0.x
+          7.0.x
     - name: which sdks are installed
       run: dotnet --list-sdks
     - name: Install dependencies