chore(deps): update devdependency @nuxt/content to v3

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
   },
   "devDependencies": {
     "@nuxt-themes/tokens": "^2.1.1",
-    "@nuxt/content": "2.7.2",
+    "@nuxt/content": "3.9.0",
     "@nuxt/devtools": "^0.7.5",
     "@nuxthq/studio": "^0.13.4",
     "@nuxtjs/eslint-config-typescript": "^12.0.0",