Update files/zh-cn/web/api/performancelongtasktiming/index.md

Co-authored-by: A1lo <[email protected]>
mdn · Aug 26, 2024 · 6d292b8 · 6d292b8
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diff --git a/files/zh-cn/web/api/performancelongtasktiming/index.md b/files/zh-cn/web/api/performancelongtasktiming/index.md
@@ -36,7 +36,7 @@ slug: Web/API/PerformanceLongTaskTiming
 
 即执行任务的容器清单。针对没有在顶层页面容器内执行的任务，`containerId`、`containerName`和`containerSrc`字段可以用来提供任务源信息。
 
-## 使用说明
+## 示例
 
 ```js
 var observer = new PerformanceObserver(function (list) {