Sample code modification GetBufferSize

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

zh-cn/application-dev/media/audio-capturer.md

@@ -112,7 +112,7 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
    let numBuffersToCapture = 150; // 循环写入150次
    let count = 0;
    while (numBuffersToCapture) {
-     let bufferSize = await audioCapturer.getBuffersize();
+     let bufferSize = await audioCapturer.getBufferSize();
      let buffer = await audioCapturer.read(bufferSize, true);
      let options = {
        offset: count * this.bufferSize,
@@ -194,7 +194,7 @@ AudioCapturer提供了用于获取原始音频文件的方法。开发者可以
    let audioTime : number = await audioCapturer.getAudioTime();
    
    // 获取合理的最小缓冲区大小
-   let bufferSize : number = await audioCapturer.getBuffersize();
+   let bufferSize : number = await audioCapturer.getBufferSize();
    ```
 
 7. （可选）使用on('markReach')方法订阅采集器标记到达事件，使用off('markReach')取消订阅事件。

zh-cn/application-dev/media/audio-renderer.md

@@ -232,7 +232,7 @@ AudioRenderer提供了渲染音频文件和控制播放的接口，开发者可
    let audioTime : number = await audioRenderer.getAudioTime();
 
    // 获取合理的最小缓冲区大小
-   let bufferSize : number = await audioRenderer.getBuffersize();
+   let bufferSize : number = await audioRenderer.getBufferSize();
 
    // 获取渲染速率
    let renderRate : audio.AudioRendererRate = await audioRenderer.getRenderRate();