update zh-cn/application-dev/quick-start/arkts-state.md.

Signed-off-by: N耿文广 <gengwenguang@huawei.com>

zh-cn/application-dev/quick-start/arkts-state.md

@@ -296,14 +296,14 @@ struct MyComponent {
 2. 对于\@State来说，命名参数机制传递的值并不是必选的，如果没有命名参数传值，则使用本地初始化的默认值：
 
    ```ts
-class C1 {
+   class C1 {
       public count:number;
       public increaseBy:number;
       constructor(count: number, increaseBy:number) {
       this.count = count;
       this.increaseBy = increaseBy;
      }
-}
-let obj = new C1(1, 2)
-MyComponent(obj)
+   }
+   let obj = new C1(1, 2)
+   MyComponent(obj)
    ```