revert: revert nuxt/content to v2

Author: huang-julien

docs/package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@iconify-json/heroicons": "^1.1.24",
     "@iconify-json/simple-icons": "^1.1.114",
-    "@nuxt/content": "^3.0.0",
+    "@nuxt/content": "^2.13.4",
     "@nuxt/fonts": "^0.10.3",
     "@nuxt/image": "^1.9.0",
     "@nuxt/ui-pro": "^1.7.0",