chore: bring back @nuxt/ui version ping for docs

Author: antfu

docs/package.json

@@ -11,6 +11,9 @@
   "dependencies": {
     "@vueuse/core": "^11.0.3"
   },
+  "resolutions": {
+    "@nuxt/ui": "2.15.2"
+  },
   "devDependencies": {
     "@iconify-json/catppuccin": "^1.2.0",
     "@iconify-json/ph": "^1.2.0",
@@ -19,7 +22,6 @@
     "@nuxt/devtools": "1.3.1",
     "@nuxt/fonts": "^0.7.2",
     "@nuxt/image": "^1.8.0",
-    "@nuxt/ui": "^2.18.4",
     "@nuxt/ui-pro": "^1.4.1",
     "@nuxthq/studio": "^2.0.3",
     "@nuxtjs/plausible": "^1.0.2",