Sample code content modification

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

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

@@ -3085,7 +3085,7 @@ audioCapturer.read(bufferSize, true, async(err, buffer) => {
     if (!err) {
         console.log("Success in reading the buffer data");
     }
-};
+});
 ```