Bump stefanzweifel/git-auto-commit-action from 5 to 6

Bumps [stefanzweifel/git-auto-commit-action](https://github.com/stefanzweifel/git-auto-commit-action) from 5 to 6.
- [Release notes](https://github.com/stefanzweifel/git-auto-commit-action/releases)
- [Changelog](https://github.com/stefanzweifel/git-auto-commit-action/blob/master/CHANGELOG.md)
- [Commits](stefanzweifel/git-auto-commit-action@v5...v6)

---
updated-dependencies:
- dependency-name: stefanzweifel/git-auto-commit-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/code-format.yml

@@ -56,7 +56,7 @@ jobs:
     - name: configure-git-safe-directory
       run: git config --global --add safe.directory /__w/ncnn/ncnn
 
-    - uses: stefanzweifel/git-auto-commit-action@v5
+    - uses: stefanzweifel/git-auto-commit-action@v6
       with:
         commit_message: apply code-format changes