build(deps): bump peaceiris/actions-gh-pages from 3.8.0 to 3.9.0 (#138)

Bumps [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages) from 3.8.0 to 3.9.0.
- [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@068dc23...de7ea6f)

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

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

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

.github/workflows/cd.yml

@@ -133,7 +133,7 @@ jobs:
       - name: patch and cargo rustdoc
         run: make rust_docs
       - name: publish to gh-pages
-        uses: peaceiris/actions-gh-pages@068dc23d9710f1ba62e86896f84735d869951305
+        uses: peaceiris/actions-gh-pages@de7ea6f8efb354206b205ef54722213d99067935
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: target/doc/