Minor tweak

Author: javiereguiluz

messenger.rst

@@ -814,7 +814,7 @@ directory. For example, you can create a new ``messenger-worker.service`` file.
 
     [Service]
     ExecStart=php /path/to/your/app/bin/console messenger:consume async --time-limit=3600
-    # For Redis, set a custom consumer name for each instance
+    # for Redis, set a custom consumer name for each instance
     Environment="MESSENGER_CONSUMER_NAME=symfony-%n-%i"
     Restart=always
     RestartSec=30