Fix switch camera method description

dist/types/preview.d.ts

@@ -110,15 +110,15 @@ export interface LocalVideoTrack {
        * Determines whether to crop the background image to an appropriate aspect ratio (16/9), default is false.
        */
       cropped?: boolean;
-    },
+    }
   ): Promise<void | Error>;
   /**
    * Stops local video capture.
    */
   stop(): Promise<void | Error>;
   /**
-   * Switch microphone.
-   * @param deviceId The ID of the microphone to switch to.
+   * Switch camera.
+   * @param deviceId The ID of the camera to switch to.
    */
   switchCamera(deviceId: string): Promise<void | Error>;
   /**
@@ -128,7 +128,7 @@ export interface LocalVideoTrack {
    */
   updateVirtualBackground(
     imageUrl?: string,
-    cropped?: boolean,
+    cropped?: boolean
   ): Promise<void | Error>;
 }
 /**
@@ -164,5 +164,7 @@ export interface LocalAudioTrack {
      Tests the microphone, usually used to test the microphone before a meeting. 
      * @param options the test microphone option.
      */
-  testMicrophone(options?: TestMicrophoneOption): TestMicrophoneReturn | undefined;
+  testMicrophone(
+    options?: TestMicrophoneOption
+  ): TestMicrophoneReturn | undefined;
 }