update docs against 7252+7408+7522+7583+7278

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/application-dev/media/audio-playback.md

@@ -60,7 +60,7 @@ function setCallBack(audioPlayer) {
         audioPlayer.release(); // Release the AudioPlayer instance.
         audioPlayer = undefined;
     });
-    audioPlayer.on('timeUpdate', (seekDoneTime) => {// Set the 'timeUpdate' event callback.
+    audioPlayer.on('timeUpdate', (seekDoneTime) => { // Set the 'timeUpdate' event callback.
         if (typeof(seekDoneTime) == 'undefined') {
             console.info('audio seek fail');
             return;