add permissions to test result publish action

.github/workflows/dotnet-core.yml

@@ -43,6 +43,9 @@ jobs:
     needs: build
     if: (success() || failure()) && github.event_name == 'pull_request'
     name: Publish Unit Test Results
+    permissions:
+      checks: write
+      pull-requests: write
     steps:
       - name: Download Artifacts
         uses: actions/download-artifact@v2