build(deps): bump peaceiris/actions-gh-pages from 3.9.1 to 3.9.2

Bumps [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages) from 3.9.1 to 3.9.2.
- [Release notes](https://github.com/peaceiris/actions-gh-pages/releases)
- [Changelog](https://github.com/peaceiris/actions-gh-pages/blob/main/CHANGELOG.md)
- [Commits](peaceiris/actions-gh-pages@v3.9.1...v3.9.2)

---
updated-dependencies:
- dependency-name: peaceiris/actions-gh-pages
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/docs.yml

@@ -58,7 +58,7 @@ jobs:
           make html
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3.9.1
+        uses: peaceiris/actions-gh-pages@v3.9.2
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs/build/html/