chore(deps): bump peaceiris/actions-gh-pages from 3 to 4 (#39)

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

.github/workflows/deploy-github-pages.yml

@@ -20,7 +20,7 @@ jobs:
           export BASE_URL="https://koooge.github.io/hugo-theme-geppaku/"
           hugo --gc --minify --themesDir ../ --layoutDir ../layouts --config config/test/config.toml --baseURL "${BASE_URL}"
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           #deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
           github_token: ${{ secrets.GITHUB_TOKEN }}