Update SendgridSmtpTransport.php

Fix region null check

Author: AUDUL

src/Symfony/Component/Mailer/Bridge/Sendgrid/Transport/SendgridSmtpTransport.php

@@ -22,7 +22,7 @@ class SendgridSmtpTransport extends EsmtpTransport
 {
     public function __construct(#[\SensitiveParameter] string $key, ?EventDispatcherInterface $dispatcher = null, ?LoggerInterface $logger = null, private ?string $region = null)
     {
-        parent::__construct('null' !== $region ? \sprintf('smtp.%s.sendgrid.net', $region) : 'smtp.sendgrid.net', 465, true, $dispatcher, $logger);
+        parent::__construct(null !== $region ? \sprintf('smtp.%s.sendgrid.net', $region) : 'smtp.sendgrid.net', 465, true, $dispatcher, $logger);
 
         $this->setUsername('apikey');
         $this->setPassword($key);