👷 Update worfkow deploy-docs-notify URL (#1126)

Author: tiangolo

.github/workflows/deploy-docs.yml

@@ -67,7 +67,7 @@ jobs:
         run: python ./scripts/deploy_docs_status.py
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          DEPLOY_URL: ${{ steps.deploy.outputs.url }}
+          DEPLOY_URL: ${{ steps.deploy.outputs.deployment-url }}
           COMMIT_SHA: ${{ github.event.workflow_run.head_sha }}
           RUN_ID: ${{ github.run_id }}
           IS_DONE: "true"