Added missing code to set locale from model preferred locale

[clementbirkle]

Hi,

According to the documentation, it's possible to set the locale from a model like that: https://laravel.com/docs/9.x/mail#user-preferred-locales

It works great if you use the method to via Illuminate\Support\Facades\Mail class like in this example: https://laravel.com/docs/9.x/mail#sending-mail

But if you want to do the same inside a lluminate\Mail\Mailable class, it will not set the locale. Like this example:

<?php
 
namespace App\Mail;
 
use App\Models\Order;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Mail\Mailables\Content;
use Illuminate\Queue\SerializesModels;
 
class OrderShipped extends Mailable
{
    use Queueable, SerializesModels;
 
    protected $order;
    protected $user;
 
    public function __construct(Order $order, User $user)
    {
        $this->to($user);
    }
}

This PR fix that.