chore(deps): Bump actions/configure-pages from 3 to 4 (#1254)

Bumps [actions/configure-pages](https://github.com/actions/configure-pages) from 3 to 4.
- [Release notes](https://github.com/actions/configure-pages/releases)
- [Commits](actions/configure-pages@v3...v4)

---
updated-dependencies:
- dependency-name: actions/configure-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.yml

@@ -37,7 +37,7 @@ jobs:
       # cf. https://github.com/actions/starter-workflows/blob/4a8f18e34dd13d2b6ee4d8da2ba72629eafe1609/pages/jekyll.yml
       - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v4
 
       - name: Build site
         run: bundle exec rake build # Output to ./_site as build_dir is configured in config.rb