build(deps): bump peaceiris/actions-gh-pages

Bumps the dependencies group in /.github/workflows with 1 update: [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages).


Updates `peaceiris/actions-gh-pages` from 3 to 4
- [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...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/docs.yaml

@@ -113,7 +113,7 @@ jobs:
                     path: dist/website
 
             -   name: Deploy
-                uses: peaceiris/actions-gh-pages@v3
+                uses: peaceiris/actions-gh-pages@v4
                 with:
                     github_token: ${{ secrets.GITHUB_TOKEN }}
                     publish_dir: dist/website