feat: add can not status code exception message.

Author: ytetsuro

system/Language/en/HTTP.php

@@ -37,6 +37,7 @@
 	'cannotSetFilepath'          => 'When setting binary can not set filepath: {0}',
 	'notFoundDownloadSource'     => 'Not found download body source.',
 	'cannotSetCache'             => 'It does not supported caching for downloading.',
+	'cannotSetStatusCode'        => 'It does not supported chnage status code for downloading. code: {0}, reason: {1}',
 
 	// Response
 	'missingResponseStatus'      => 'HTTP Response is missing a status code',