test work around GitHub Actions defects - vary syntax

GitHub Actions failed without error message. Most of the times this happened, a workaround was discovered by random changes to yaml file syntax.

Author: Viir

.github/workflows/copilot-setup-steps.yml

@@ -46,5 +46,5 @@ jobs:
         run: dotnet --info
 
       - name: Checkout code
-      - uses: actions/checkout@v5
+        uses: actions/checkout@v5