Merge pull request #348 from ruby/dependabot/github_actions/actions/configure-pages-4

Author: kateinoigakukun

.github/workflows/docs.yml

@@ -28,7 +28,7 @@ jobs:
           bundler-cache: true
       - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v4
       - name: Build HTML by RDoc
         run: rake rdoc
       - name: Upload artifact