message: docs(subscription): fix batch options type reference
diff: @@ -201,7 +201,7 @@ export interface SubscriberOptions {
  * @property {number} [ackDeadline=10] Acknowledge deadline in seconds. If left
  * unset the initial value will be 10 seconds, but it will evolve into the
  * 99th percentile time it takes to acknowledge a message.
  - * @property {BatchingOptions} [batching] Request batching options.
  + * @property {BatchOptions} [batching] Request batching options.
  * @property {FlowControlOptions} [flowControl] Flow control options.
  * @property {MessageStreamOptions} [streamingOptions] Streaming options.
  */
  