minor #16529 [Mailer] Update route from annotation to attribute (mdoutreluingne)

This PR was merged into the 5.4 branch. Discussion ---------- [Mailer] Update route from annotation to attribute For this PR i update route from annotation to attribute Commits ------- e66b990 Update route from annotation to attribute

Author: javiereguiluz

mailer.rst

@@ -345,9 +345,7 @@ and create an :class:`Symfony\\Component\\Mime\\Email` object::
 
  class MailerController extends AbstractController
  {
- /**
- * @Route("/email")
- */
+ #[Route('/email')]
  public function sendEmail(MailerInterface $mailer): Response
  {
  $email = (new Email())