update zh-cn/application-dev/reference/arkui-ts/ts-universal-attributes-layout-constraints.md.

Signed-off-by: Nweiyucc <weiyucc@isoftstone.com>

zh-cn/application-dev/reference/arkui-ts/ts-universal-attributes-layout-constraints.md

@@ -75,7 +75,7 @@ struct AspectRatioExample {
 **图2** 横屏显示<br>
 ![zh-cn_image_0000001174264382](figures/zh-cn_image_0000001174264382.gif)
 
-```
+```ts
 class ContainerInfo {
   label : string = ''
   size : string = ''
@@ -92,13 +92,15 @@ struct DisplayPriorityExample {
   private container : ContainerInfo[] = [
     {label: 'Big container', size: '90%'},
     {label: 'Middle container', size: '50%'},
-    {label: 'Small container', size: '30%'}]
+    {label: 'Small container', size: '30%'}
+  ]
   private children : ChildInfo[] = [
     {text: '1\n(priority:2)', priority: 2},
     {text: '2\n(priority:1)', priority: 1},
     {text: '3\n(priority:3)', priority: 3},
     {text: '4\n(priority:1)', priority: 1},
-    {text: '5\n(priority:2)', priority: 2}]
+    {text: '5\n(priority:2)', priority: 2}
+  ]
   @State currentIndex : number = 0
 
   build() {