chore(deps): update devdependency nuxt to v3 [security]

Author: renovate[bot]

docs/package.json

@@ -6,7 +6,7 @@
   },
   "devDependencies": {
     "@nuxt/content-theme-docs": "0.11.1",
-    "nuxt": "2.15.8",
+    "nuxt": "3.12.4",
     "vue": "^2.7.14",
     "vue-server-renderer": "^2.7.14",
     "vue-tabs-component": "^1.5.0",