Bump actions/configure-pages from 3 to 4 (#526)

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

.github/workflows/build-docs.yml

@@ -38,7 +38,7 @@ jobs:
           cache-version: 0 # Increment this number if you need to re-download cached gems
       - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v4
       - name: Build with yardoc
         run: rm -rf .yardoc doc && bundle exec yardoc -o doc
         env: