Update 1.simple.md

Walking through the setup with Nuxt v3.1.0 requires accessing `.value` within the template.

docs/content/1.get-started/2.usage/1.simple.md

@@ -112,7 +112,7 @@ const hello = await $client.hello.useQuery({ text: 'client' })
 
 <template>
   <div>
-    <p>{{ hello.data?.greeting }}</p>
+    <p>{{ hello.data.value?.greeting }}</p>
   </div>
 </template>
 ```