Update stefanzweifel/git-auto-commit-action action to v4.15.0

Author: renovate[bot]

.github/workflows/format.yml

@@ -22,7 +22,7 @@ jobs:
         run: |
           black .
       - name: Commit changes
-        uses: stefanzweifel/git-auto-commit-action@v4.12.0
+        uses: stefanzweifel/git-auto-commit-action@v4.15.0
         with:
           commit_message: Apply formatting changes
           branch: main