GitHub Workflows: use Node 20, do not override Next config

.github/workflows/nextjs.yml

@@ -34,15 +34,15 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: "16"
+          node-version: "20"
           cache: ${{ steps.detect-package-manager.outputs.manager }}
       - name: Setup Pages
         uses: actions/configure-pages@v3
-        with:
+        # with:
           # Automatically inject basePath in your Next.js configuration file and disable
           # server side image optimization (https://nextjs.org/docs/api-reference/next/image#unoptimized).
           # You may remove this line if you want to manage the configuration yourself.
-          static_site_generator: next
+        #  static_site_generator: next
       - name: Restore cache
         uses: actions/cache@v3
         with: