correct the wrong annotion from zk queue implemented to java priority blocking queue (#5906)

Co-authored-by: ywang46 <ywang46@paypal.com>

dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/queue/TaskPriorityQueueImpl.java

@@ -25,8 +25,7 @@ import java.util.concurrent.TimeUnit;
 import org.springframework.stereotype.Service;
 
 /**
- * A singleton of a task queue implemented with zookeeper
+ * A singleton of a task queue implemented using PriorityBlockingQueue
- * tasks queue implementation
  */
 @Service
 public class TaskPriorityQueueImpl implements TaskPriorityQueue<TaskPriority> {