[ISSUE #3341](doc)fix typo in update operation.md

(doc)fix typo in update operation.md

docs/cn/operation.md

@@ -25,7 +25,7 @@ The Name Server boot success...
 ### 启动Broker
 $ nohup sh bin/mqbroker -n localhost:9876 &
 
-### 验证Name Server 是否启动成功，例如Broker的IP为：192.168.1.2，且名称为broker-a
+### 验证Broker是否启动成功，例如Broker的IP为：192.168.1.2，且名称为broker-a
 $ tail -f ~/logs/rocketmqlogs/broker.log 
 The broker[broker-a, 192.169.1.2:10911] boot success...
 ```

docs/en/operation.md

@@ -25,7 +25,7 @@ The Name Server boot success...
 ### start Broker
 $ nohup sh bin/mqbroker -n localhost:9876 &
 
-### check whether Name Server is successfully started, eg: Broker's IP is 192.168.1.2, Broker's name is broker-a
+### check whether Broker is successfully started, eg: Broker's IP is 192.168.1.2, Broker's name is broker-a
 $ tail -f ~/logs/rocketmqlogs/Broker.log 
 The broker[broker-a, 192.169.1.2:10911] boot success...
 ```