update assets folder links

Author: Arhell

assets/AppAsset.php

@@ -1,8 +1,8 @@
 <?php
 /**
- * @link http://www.yiiframework.com/
+ * @link https://www.yiiframework.com/
  * @copyright Copyright (c) 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
+ * @license https://www.yiiframework.com/license/
  */
 
 namespace app\assets;