Force push to dokku temporarily

Author: markstory

.github/workflows/deploy_docs_4x.yml

@@ -19,4 +19,5 @@ jobs:
         uses: dokku/github-action@master
         with:
           git_remote_url: 'ssh://dokku@apps.cakephp.org:22/debugkit-docs-4'
+          git_push_flags: '-f'
           ssh_private_key: ${{ secrets.DOKKU_SSH_PRIVATE_KEY }}