Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.3 (#2412)

Bumps [peaceiris/actions-gh-pages](https://github.com/peaceiris/actions-gh-pages) from 3.9.0 to 3.9.3.
- [Release notes](https://github.com/peaceiris/actions-gh-pages/releases)
- [Changelog](https://github.com/peaceiris/actions-gh-pages/blob/main/CHANGELOG.md)
- [Commits](https://github.com/peaceiris/actions-gh-pages/compare/de7ea6f8efb354206b205ef54722213d99067935...373f7f263a76c20808c831209c920827a82a2847)

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

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

cumulus/.github/workflows/docs.yml

@@ -32,7 +32,7 @@ jobs:
         run:  echo "<meta http-equiv=refresh content=0;url=cumulus_client_collator/index.html>" > ./target/doc/index.html
 
       - name: Deploy documentation
-        uses: peaceiris/actions-gh-pages@de7ea6f8efb354206b205ef54722213d99067935 # v3.9.0
+        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_branch: gh-pages