Update devDependency @nuxt/content to v3

Author: renovate[bot]

apps/docs/package.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "@formatjs/cli": "^6.3.8",
-    "@nuxt/content": "^2.13.4",
+    "@nuxt/content": "^3.1.1",
     "@nuxt/eslint": "^0.7.0",
     "@nuxt/eslint-config": "^0.7.0",
     "@nuxt/icon": "^1.7.5",