docs: add note to require filter setting for last_active

Author: datamweb

src/Config/Auth.php

@@ -184,6 +184,9 @@ class Auth extends BaseConfig
      * --------------------------------------------------------------------
      * If true, will always update the `last_active` datetime for the
      * logged in user on every page request.
+     * This feature only works when session/tokens/chain filter is set correctly.
+     * 
+     * @see https://codeigniter4.github.io/shield/install/#protect-all-pages for set filters.
      */
     public bool $recordActiveDate = true;