Update hello-world example

examples/custom-layout/pages/about.vue

@@ -10,7 +10,7 @@ export default {
   layout: 'dark',
   data ({ req }) {
     return {
-      name: req ? 'server' : 'client'
+      name: req ? 'server' : 'client2'
     }
   }
 }

examples/hello-world/pages/about.vue

@@ -1,5 +1,8 @@
 <template>
-  <p>Hi from {{ name }}</p>
+  <div>
+    <p>Hi from {{ name }}</p>
+    <nuxt-link to="/">Home page</nuxt-link>
+  </div>
 </template>
 
 <script>