Clarify text regarding enabling/disabling modules

We have removed the option to add enable/disable/default-enable/default-disable files, so this is no longer an override

config-templates/config.php

@@ -470,7 +470,7 @@ $config = [
      ***********/
 
     /*
-     * Configuration to override module enabling/disabling.
+     * Configuration for enabling/disabling modules. By default the 'core' and 'saml' modules are enabled.
      *
      * Example:
      *