docs: lazy loading example (vuejs#1995)

Co-authored-by: Eduardo San Martin Morote <[email protected]>

Author: Kiansa

packages/docs/guide/advanced/lazy-loading.md

@@ -17,7 +17,11 @@ const UserDetails = () => import('./views/UserDetails.vue')
 
 const router = createRouter({
   // ...
-  routes: [{ path: '/users/:id', component: UserDetails }],
+  routes: [
+    { path: '/users/:id', component: UserDetails }
+    // or use it directly in the route definition
+    { path: '/users/:id', component: () => import('./views/UserDetails.vue') },
+  ],
 })
 ```