[Notifer][Smsapi] Set messageId of SentMessage

Author: tomasz-kusy

src/Symfony/Component/Notifier/Bridge/Smsapi/SmsapiTransport.php

@@ -84,6 +84,9 @@ protected function doSend(MessageInterface $message): SentMessage
             throw new TransportException(sprintf('Unable to send the SMS: "%s".', $content['message'] ?? 'unknown error'), $response);
         }
 
-        return new SentMessage($message, (string) $this);
+        $sentMessage = new SentMessage($message, (string) $this);
+        $sentMessage->setMessageId($content['list'][0]['id'] ?? '');
+
+        return $sentMessage;
     }
 }