bug #12573 Added missing closing parentheses and closing bracket (phoefnagel)

This PR was submitted for the master branch but it was merged into the 4.3 branch instead (closes #12573).

Discussion
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Added missing closing parentheses and closing bracket

Noticed they were missing so I added them.

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Commits
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43a239b Missing closing parentheses and closing bracket

Author: OskarStark

components/messenger.rst

@@ -302,7 +302,7 @@ do is to write your own CSV receiver::
                 throw $exception;
             }
 
-            return [$envelope->with(new CustomStamp($yourEnvelope['id']);
+            return [$envelope->with(new CustomStamp($yourEnvelope['id']))];
         }
 
         public function ack(Envelope $envelope): void