⬆️ Updates actions/upload-artifact action to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/check-urls.yml

@@ -16,6 +16,6 @@ jobs:
  ruby-version: 2.4.1
  - run: gem install awesome_bot
  - run: for i in ${{ steps.file_changes.outputs.files_modified }}; do echo; echo "processing $i"; awesome_bot $i --allow-redirect --allow-dupe --allow-ssl || true; done
- - uses: actions/upload-artifact@v2
+ - uses: actions/upload-artifact@v4
  with:
  path: ${{ github.workspace }}/*.json