avplayer audio track Signed-off-by: x30034819 <xieyijun3@huawei.com>

Signed-off-by: Nx30034819 <xieyijun3@huawei.com>
Change-Id: I1827288d24b462b2cc39cb96cf311c66ab2217a6

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

@@ -1018,7 +1018,7 @@ selectTrack(index: number): void
 
 ```js
 let index = 2
-avPlayer.setBitrate(index)
+avPlayer.selectTrack(index)
 ```
 
 ### deselectTrack<sup>10+</sup><a name=avplayer_deselecttrack></a>