Update actions/configure-pages action to v6

Author: renovate[bot]

.github/workflows/hugo.yml

@@ -47,7 +47,7 @@ jobs:
           submodules: recursive
       - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v4
+        uses: actions/configure-pages@v6
       - name: Install Node.js dependencies
         run: "[[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true"
       - name: Build with Hugo