build(deps): bump peaceiris/actions-gh-pages from 3 to 4

Bumps [peaceiris/actions-gh-pages](https://github.com/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
...

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

.github/workflows/build.yaml

@@ -72,7 +72,7 @@ jobs:
     #     poetry publish --build
     # - name: Deploy docs
     #   if: startsWith(github.ref, 'refs/tags/v') && matrix.python-version == '3.11' && runner.os == 'Linux'
-    #   uses: peaceiris/actions-gh-pages@v3
+    #   uses: peaceiris/actions-gh-pages@v4
     #   with:
     #     github_token: ${{ secrets.GITHUB_TOKEN }}
     #     publish_dir: ./site
@@ -115,7 +115,7 @@ jobs:
       #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       #     # CUSTOM_DOMAIN: optionaldomain.com
       - name: Deploy docs
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./site