build: 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/generate-wiki-toc.yml

@@ -32,7 +32,7 @@ jobs:
           include: "*.md"
           regex: true
 
-      - uses: stefanzweifel/git-auto-commit-action@v5
+      - uses: stefanzweifel/git-auto-commit-action@v6
         with:
           commit_message: Auto update Wiki tables of contents
           file_pattern: "*.md"