chore: fix path

Author: antfu

packages/core/playground/src/pages/index.vue

@@ -8,7 +8,7 @@ import HelloWorld from '../components/HelloWorld.vue'
       <img src="/vite.svg" class="logo" alt="Vite logo">
     </a>
     <a href="https://vuejs.org/" target="_blank">
-      <img src="./assets/vue.svg" class="logo vue" alt="Vue logo">
+      <img src="../assets/vue.svg" class="logo vue" alt="Vue logo">
     </a>
   </div>
   <HelloWorld msg="Vite + Vue" />