update zh-cn/application-dev/reference/apis/js-apis-router.md.

Signed-off-by: NLiAn <lian15@huawei.com>
Signed-off-by: NLiAn <lian15@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-router.md

@@ -183,6 +183,7 @@ getState(): RouterState
 | 类型                          | 说明      |
 | --------------------------- | ------- |
 | [RouterState](#routerstate) | 页面状态信息。 |
+
 **示例：** 
 
 ```js