update zh-cn/application-dev/reference/apis/Readme-CN.md.

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

zh-cn/application-dev/reference/apis/Readme-CN.md

@@ -206,7 +206,7 @@
   - [@ohos.arkui.dragController (DragController)](js-apis-arkui-dragController.md)
   - [@ohos.arkui.drawableDescriptor (DrawableDescriptor)](js-apis-arkui-drawableDescriptor.md)
   - [@ohos.arkui.inspector (布局回调)](js-apis-arkui-inspector.md)
-  - [ @ohos.arkui.performanceMonitor (性能监测)](js-apis-arkui-performancemonitor.md)
+  - [@ohos.arkui.performanceMonitor (性能监测)](js-apis-arkui-performancemonitor.md)
   - [@ohos.arkui.UIContext (UIContext)](js-apis-arkui-UIContext.md)
   - [@ohos.curves (插值计算)](js-apis-curve.md)
   - [@ohos.font (注册自定义字体)](js-apis-font.md)