downgrade actions/download-artifact to v3 (#11230)

.github/workflows/check-urls.yml

@@ -104,7 +104,7 @@ jobs:
       - name: Checkout  # for having the sources of the local action
         uses: actions/checkout@v4
         # download and unzip the ab-results-*.json generated by job-matrix: check-urls
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v3
         with:
           name: ${{ steps.set-output.outputs.FILENAME}}
       - name: Generate Summary Report