[examples/data-literate,#667][s]: upgrade next v12 - nothing needing fixing.

Updated nextjs to latest version (12.1.0)

examples/data-literate/package.json

@@ -4,10 +4,12 @@
   "private": true,
   "scripts": {
     "dev": "next dev",
-    "build": "next build",
     "build": "next build && next export",
     "start": "next start"
   },
+  "engines": {
+    "node": ">12"
+  },
   "dependencies": {
     "@headlessui/react": "^1.3.0",
     "@heroicons/react": "^1.0.3",
@@ -16,7 +18,7 @@
     "autoprefixer": "^10.0.4",
     "frictionless.js": "^0.13.4",
     "gray-matter": "^4.0.3",
-    "next": "11.1.3",
+    "next": "12.1.0",
     "next-mdx-remote": "^3.0.4",
     "papaparse": "^5.3.1",
     "postcss": "^8.2.10",