👷 Upgrade actions/checkout from v5 to v6 (#109)

Author: tiangolo

.github/workflows/latest-changes.yml

@@ -20,9 +20,7 @@ jobs:
   latest-changes:
     runs-on: ubuntu-latest
     steps:
-      # pin to actions/checkout@v5 for compatibility with latest-changes
-      # Ref: https://github.com/actions/checkout/issues/2313
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # To allow latest-changes to commit to master
           token: ${{ secrets.NGINX_RTMP_DOCKER_LATEST_CHANGES }}