优化 show-action-sheet 示例，支持横屏显示。

pages/API/show-action-sheet/show-action-sheet.uvue

-<template>
+<template>
+  <!-- #ifdef APP -->
+  <scroll-view style="flex: 1;">
+  <!-- #endif -->
   <view>
     <page-head :title="title"></page-head>
     <view class="uni-list">
@@ -29,7 +32,10 @@
           sheet</button>
       </view>
     </view>
-  </view>
+  </view>
+  <!-- #ifdef APP -->
+  </scroll-view>
+  <!-- #endif -->
 </template>
 <script lang="uts">
   type ItemType = {