Fix styling

Author: freekmurze

src/Notification.php

@@ -31,7 +31,7 @@ public function getEvent(): JobFailed
 
     public function toMail($notifiable): MailMessage
     {
-        return (new MailMessage)
+        return (new MailMessage())
             ->error()
             ->subject('A job failed at '.config('app.url'))
             ->line("Exception message: {$this->event->exception->getMessage()}")
@@ -43,7 +43,7 @@ public function toMail($notifiable): MailMessage
 
     public function toSlack(): SlackMessage
     {
-        return (new SlackMessage)
+        return (new SlackMessage())
             ->error()
             ->content('A job failed at '.config('app.url'))
             ->attachment(function (SlackAttachment $attachment) {