fix: auto-importsのstartingFileのパス修正

Author: atlansien

content/2.concepts/4.auto-imports/.template/index.ts

@@ -1,7 +1,7 @@
 import type { GuideMeta } from '~/types/guides'
 
 export const meta: GuideMeta = {
-  startingFile: 'pages/index.vue',
+  startingFile: 'app.vue',
   features: {
     fileTree: true,
   },