chore: update demo

apps/web-antd/src/views/nested/menu-3-2-1.vue

@@ -1,15 +1,9 @@
 <script lang="ts" setup>
-import { onMounted } from 'vue';
+import { Fallback } from '@vben/universal-ui';
 
 defineOptions({ name: 'Menu321' });
-onMounted(() => {
-  // eslint-disable-next-line no-console
-  console.log('Menu3-2-1');
-});
 </script>
+
 <template>
-  <div class="p-5">
-    menu-3-2-1
-    <input class="bg-background border-border" />
-  </div>
+  <Fallback status="hello" />
 </template>