Update actions/github-pages

Author: renovate[bot]

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
         run: bundle exec jekyll build --trace --baseurl "${BASE_URL}"
 
       - name: "Upload 'github-pages' artifact."
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: _site/
 
@@ -124,7 +124,7 @@ jobs:
     steps:
       - name: "Deploy to GitHub Pages"
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5
 
 
   cache: