minor symfony#1477 Fix comment about mailer config (HeahDude)

This PR was merged into the main branch.

Discussion
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Fix comment about mailer config

The config files have been merged and `when@dev` is now used.

Commits
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efd97d9 Fix comment about mailer config

Author: javiereguiluz

src/EventSubscriber/CommentNotificationSubscriber.php

@@ -76,8 +76,8 @@ public function onCommentCreated(CommentCreatedEvent $event): void
             ->html($body)
         ;
 
-        // In config/packages/dev/mailer.yaml the delivery of messages is disabled.
-        // That's why in the development environment you won't actually receive any email.
+        // In config/packages/mailer.yaml the delivery of messages is disabled in the development environment.
+        // That's why you won't actually receive any email.
         // However, you can inspect the contents of those unsent emails using the debug toolbar.
         $this->mailer->send($email);
     }