[Mailer] Sort transports alphabetically

Author: OskarStark

DependencyInjection/FrameworkExtension.php

@@ -2437,11 +2437,11 @@ private function registerMailerConfiguration(array $config, ContainerBuilder $co
             MailgunTransportFactory::class => 'mailer.transport_factory.mailgun',
             MailjetTransportFactory::class => 'mailer.transport_factory.mailjet',
             MandrillTransportFactory::class => 'mailer.transport_factory.mailchimp',
+            OhMySmtpTransportFactory::class => 'mailer.transport_factory.ohmysmtp',
             PostmarkTransportFactory::class => 'mailer.transport_factory.postmark',
             SendgridTransportFactory::class => 'mailer.transport_factory.sendgrid',
             SendinblueTransportFactory::class => 'mailer.transport_factory.sendinblue',
             SesTransportFactory::class => 'mailer.transport_factory.amazon',
-            OhMySmtpTransportFactory::class => 'mailer.transport_factory.ohmysmtp',
         ];
 
         foreach ($classToServices as $class => $service) {