Commands not working for creating the topics

Please describe the issue you observed:

The following commands for creating the topics in RocketMQ are not working and need to update.

```
bash bin/mqadmin updateTopic -c DefaultCluster -t string-topic
bash bin/mqadmin updateTopic -c DefaultCluster -t order-paid-topic
bash bin/mqadmin updateTopic -c DefaultCluster -t message-ext-topic
bash bin/mqadmin updateTopic -c DefaultCluster -t spring-transaction-topic
```
Error Log: While creating the topics using above command

```
mac rocketmq-all-5.0.0-bin-release % bin/mqadmin updateTopic -c DefaultCluster -t string-topic
org.apache.rocketmq.tools.command.SubCommandException: UpdateTopicSubCommand command failed
at org.apache.rocketmq.tools.command.topic.UpdateTopicSubCommand.execute(UpdateTopicSubCommand.java:198)
at org.apache.rocketmq.tools.command.MQAdminStartup.main0(MQAdminStartup.java:165)
at org.apache.rocketmq.tools.command.MQAdminStartup.main(MQAdminStartup.java:114)
Caused by: org.apache.rocketmq.remoting.exception.RemotingConnectException: connect to null failed
at org.apache.rocketmq.remoting.netty.NettyRemotingClient.invokeSync(NettyRemotingClient.java:473)
at org.apache.rocketmq.client.impl.MQClientAPIImpl.getBrokerClusterInfo(MQClientAPIImpl.java:1755)
at org.apache.rocketmq.tools.admin.DefaultMQAdminExtImpl.examineBrokerClusterInfo(DefaultMQAdminExtImpl.java:556)
at org.apache.rocketmq.tools.admin.DefaultMQAdminExt.examineBrokerClusterInfo(DefaultMQAdminExt.java:307)
at org.apache.rocketmq.tools.command.CommandUtil.fetchMasterAddrByClusterName(CommandUtil.java:95)
at org.apache.rocketmq.tools.command.topic.UpdateTopicSubCommand.execute(UpdateTopicSubCommand.java:171)
... 2 more
```
The DefaultCluster need to replace with the proper address and port number is:

```
mac rocketmq-all-5.0.0-bin-release % bin/mqadmin updateTopic -n localhost:9876 -b 192.168.1.8:10911 -t rocketMQ
create topic to 192.168.1.8:10911 success.
TopicConfig [topicName=rocketMQ, readQueueNums=8, writeQueueNums=8, perm=RW-, topicFilterType=SINGLE_TAG, topicSysFlag=0, order=false, attributes={}]%
```