fix:[lar-169] mail bug for ThreadConverted (#303)

Author: cybersoldattech

app/Notifications/ThreadConvertedByCreator.php

@@ -13,7 +13,7 @@ final class ThreadConvertedByCreator extends Notification
 {
     use Queueable;
 
-    public function __construct(public Thread $thread) {}
+    public function __construct(protected Thread $thread) {}
 
     /**
      * Get the notification's delivery channels.
@@ -31,7 +31,7 @@ public function via(object $notifiable): array
     public function toMail(object $notifiable): MailMessage
     {
         return (new MailMessage)
-            ->subject(__('pages/discussion.converted_by_creator'))
+            ->subject(__('pages/discussion.converted_by_creator.subject'))
             ->line(__('pages/discussion.converted_by_creator.converted_line'))
             ->line(__('pages/discussion.converted_by_creator.thread_title').$this->thread->title)
             ->action(__('pages/discussion.converted_by_creator.action_text'), route('forum.show', $this->thread))