Make QueueBusy event consistent with other queue events (#56673)

Author: AhmedAlaa4611

src/Illuminate/Queue/Events/QueueBusy.php

@@ -7,12 +7,12 @@ class QueueBusy
     /**
      * Create a new event instance.
      *
-     * @param  string  $connection  The connection name.
+     * @param  string  $connectionName  The connection name.
      * @param  string  $queue  The queue name.
      * @param  int  $size  The size of the queue.
      */
     public function __construct(
-        public $connection,
+        public $connectionName,
         public $queue,
         public $size,
     ) {