Align documentation with standard

auth.php

@@ -67,7 +67,9 @@ class auth_plugin_outage extends auth_plugin_base {
     }
 
     /**
-     * @inheritDoc
+     * Returns true if the plugin supports the new login flow for MFA.
+     *
+     * @return bool True
      */
     public static function supports_mfa(): bool {
         return true;