fix: use autowire attribute

config/services.yaml

@@ -25,9 +25,5 @@ services:
             - '../src/Entity/'
             - '../src/Kernel.php'
 
-    App\Service\Mailer:
-        arguments:
-            $pdfDirectory: '%app.pdf_directory%'
-
     # add more service definitions when explicit configuration is needed
     # please note that last definitions always *replace* previous ones

src/Service/Mailer.php

@@ -7,11 +7,13 @@
 use App\Entity\Dinosaur;
 use App\Entity\User;
 use Symfony\Bridge\Twig\Mime\TemplatedEmail;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 
 final readonly class Mailer
 {
     public function __construct(
         private MailerInterface $mailer,
+        #[Autowire('%app.pdf_directory%')]
         private string $pdfDirectory
     ) {
     }