Update _update-readme.yml

.github/workflows/_update-readme.yml

@@ -30,7 +30,7 @@ jobs:
           git add README.md
           git diff-index --quiet HEAD || git commit -m "[Bot] Update README.md"
           git status
-          git push -u origin ${{ steps.create-branch-name.outputs.branch_name }}
+          git diff-index --quiet HEAD || git push -u origin ${{ steps.create-branch-name.outputs.branch_name }}
       - uses: tibdex/github-app-token@v1
         if: ${{ !env.ACT }}
         id: create-app-token