Revert "build(deps): bump actions/upload-artifact from 3 to 4" (#1243)

Author: panva

.github/workflows/conformance.yml

@@ -253,7 +253,7 @@ jobs:
  run: |
  zip -ur ${{ env.EXPORT_FILE }} server.log
  - name: Upload test artifacts
- uses: actions/upload-artifact@v4
+ uses: actions/upload-artifact@v3
  with:
  path: export-*.zip
  name: certification html results