Sample code modification

Signed-off-by: Njiao_yanlin <jiaoyanlin@huawei.com>

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

@@ -283,7 +283,7 @@ createTonePlayer(options: AudioRendererInfo, callback: AsyncCallback<TonePlay
 import audio from '@ohos.multimedia.audio';
 
 let audioRendererInfo = {
-  content : audio.ContentType.CONTENT_TYPE_MUSIC,
+  content : audio.ContentType.CONTENT_TYPE_SONIFICATION,
   usage : audio.StreamUsage.STREAM_USAGE_MEDIA,
   rendererFlags : 0
 }