[RIP-9] Polish Example_Orderly.md

docs/en/Example_Orderly.md

@@ -5,7 +5,8 @@ RocketMQ provides ordered messages using FIFO order. All related messages need t
 The following demonstrates ordered messages by ensuring order of create, pay, send and finish steps of sales order process.
 
 ## 1 produce ordered messages
-```
+
+```java
 package org.apache.rocketmq.example.order2
 
 import org.apache.rocketmq.client.producer.DefaultMQProducer;
@@ -169,7 +170,7 @@ public class Producer {
 
 ## 2.2 Consume ordered messages
 
-```
+```java
 
 package org.apache.rocketmq.example.order2;