[client][javadoc] fix a typo of ConsumerBuilder javadoc
@@ -105,7 +105,7 @@ public interface ConsumerBuilder<T> extends Cloneable {
*
* @return a future that yields a {@link Consumer} instance
* @throws PulsarClientException
- * if the the subscribe operation fails
+ * if the subscribe operation fails
*/
CompletableFuture<Consumer<T>> subscribeAsync();
