fix: Unhead v2 compatibility

Author: harlan-zw

Diff for: src/runtime/app/composables/useRobotsRule.ts

@@ -1,7 +1,7 @@
 import type { MaybeRef } from 'vue'
 // @ts-expect-error untyped
 import { devRootDir } from '#build/nuxt.config.mjs'
-import { injectHead, useHead } from '@unhead/vue'
+import { injectHead, useHead } from '#imports'
 import { setHeader } from 'h3'
 import {
   useRequestEvent,

Diff for: src/runtime/app/plugins/robot-meta.server.ts

@@ -1,4 +1,4 @@
-import { useServerHead } from '@unhead/vue'
+import { useHead } from '#imports'
 import { defineNuxtPlugin, useRequestEvent, useRuntimeConfig } from 'nuxt/app'
 
 export default defineNuxtPlugin({
@@ -10,7 +10,7 @@ export default defineNuxtPlugin({
       return
     const config = useRuntimeConfig()
 
-    useServerHead({
+    useHead({
       meta: [
         {
           'name': 'robots',