fix: create branch before committing changes

.github/workflows/update-readme.yml

@@ -41,6 +41,9 @@ jobs:
         run: |
           git status --porcelain > changes.diff
           echo "diff_count=$(cat changes.diff | wc -l)" >> $GITHUB_OUTPUT
+      - name: Create branch
+        if: steps.changes.outputs.diff_count != '0'
+        run: git checkout -b update-readme-${{ github.run_id }}
       - name: Commit changes
         if: steps.changes.outputs.diff_count != '0'
         uses: stefanzweifel/git-auto-commit-action@v5