added url_type option to cloud files config

added default url type to Rackspace Cloud Files config to match the pr #7409 in laravel/framework

config/filesystems.php

@@ -63,6 +63,7 @@ return [
 			'container' => 'your-container',
 			'endpoint'  => 'https://identity.api.rackspacecloud.com/v2.0/',
 			'region'    => 'IAD',
+			'url_type'	=> 'publicURL'
 		],
 
 	],