minor symfony#11978 Fix supervisor: need to use the group:* to start all processes in this group (weaverryan)

This PR was merged into the 4.3 branch.

Discussion
----------

Fix supervisor: need to use the group:* to start all processes in this group

Tested locally - ran into this when setting up supervisor for the SymfonyCasts tutorial today :). The typo was originally mine.

Commits
-------

b6cee52 Fix supervisor: need to use the group:* to start all processes in this group

Author: javiereguiluz

messenger.rst

@@ -619,7 +619,7 @@ config and start your workers:
 
     $ sudo supervisorctl update
 
-    $ sudo supervisorctl start messenger-consume
+    $ sudo supervisorctl start messenger-consume:*
 
 See the `Supervisor docs`_ for more details.