fix comment

config/session.php

@@ -90,10 +90,9 @@ return [
     | Session Cache Store
     |--------------------------------------------------------------------------
     |
-    | When using the "apc" or "memcached" session drivers, you may specify
-    | a cache store that should be used for these sessions. This should
-    | correspond to a store in your cache configuration. By default,
-    | the driver name will be used as the store.
+    | When using the "apc" or "memcached" session drivers, you may specify a
+    | cache store that should be used for these sessions. This value must
+    | correspond with one of the application's configured cache stores.
     |
     */