Bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0 (#281)

Bumps [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages) from 3.9.3 to 4.0.0.
- [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@v3.9.3...v4.0.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/gh-pages.yml

@@ -123,7 +123,7 @@ jobs:
         cp -R temp/site/. public/dev/en
         
     - name: Deploy
-      uses: peaceiris/actions-gh-pages@v3.9.3
+      uses: peaceiris/actions-gh-pages@v4.0.0
       with:
         deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
         publish_branch: gh-pages