title: pass action-sql-expression to a topic subscription
body: <p>I want to do action-sql-expression command on a subscription. I have this:</p>
  
  <pre><code>az servicebus topic subscription rule create ^
  --resource-group %resourcegroup_name% ^
  --namespace %namespace_name% ^
  --topic-name %topic_name% ^
  --subscription-name %subscription_name% ^
  --name %rule_name ^
  --action-sql-expression SET TopicName=%topic_name%
  </code></pre>
  
  <p>But I am getting this error:</p>
  
  <pre><code>az: error: unrecognized arguments: TopicName=MyTopic
  </code></pre>
  
  <p>How can I pass the argument for action-sql-expression?</p>