use actions/setup-dotnet v2 in actions (#162)

Author: Meir017

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup .NET 6
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         with:
           dotnet-version: 6.0.x
       - run: dotnet test src --configuration Release --filter 'TestCategory=Completed'