fix typo

artisan

@@ -40,7 +40,7 @@ $status = $kernel->handle(
 | Shutdown The Application
 |--------------------------------------------------------------------------
 |
-| Once Artisan has finished running. We will fire off the shutdown events
+| Once Artisan has finished running, we will fire off the shutdown events
 | so that any final work may be done by the application before we shut
 | down the process. This is the last thing to happen to the request.
 |