Fix comment on default session driver.

app/config/session.php

@@ -8,7 +8,7 @@ return array(
 	|--------------------------------------------------------------------------
 	|
 	| This option controls the default session "driver" that will be used on
-	| requests. By default we will use the light-weight cookie driver but
+	| requests. By default we will use the light-weight native driver but
 	| you may specify any of the other wonderful drivers provided here.
 	|
 	| Supported: "native", "cookie", "database", "apc",