[Messenger] Document StopWorkerException

Author: lyrixx

messenger.rst

@@ -461,6 +461,11 @@ The first argument is the receiver's name (or service id if you routed to a
 custom service). By default, the command will run forever: looking for new messages
 on your transport and handling them. This command is called your "worker".
 
+.. versionadded:: 5.4
+
+    Throw an instance of :class:`Symfony\\Component\\Messenger\\Exception\\StopWorkerException`. to stop properly the worker.
+
+
 Deploying to Production
 ~~~~~~~~~~~~~~~~~~~~~~~