protobuf更换包名

docs/agent-message.md

@@ -85,7 +85,7 @@ public class TestMessageManager extends AbstractService {
         manager.createTopic("topic_1", "topic_2").join();
     }
 
-    // 创建topic
+    // 删除topic
     public void deleteTopic() {
         manager.deleteTopic("topic_1", "topic_2").join();
     }