Update actions/configure-pages action to v6

Author: renovate[bot]

.github/workflows/github-pages.yml

@@ -42,7 +42,7 @@ jobs:
         run: make docs-build
 
       - name: Setup Pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@v6
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v4