add back checkout in report-coverage

Signed-off-by: bowenlan-amzn <[email protected]>

Author: bowenlan-amzn

.github/workflows/test-and-build-workflow.yml

@@ -157,6 +157,7 @@ jobs:
     if: always()
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
         with:
           path: downloaded-artifacts