fw att control: update param description

src/modules/fw_att_control/fw_att_control_params.c

@@ -280,9 +280,10 @@ PARAM_DEFINE_FLOAT(FW_YCO_VMIN, 1000.0f);
  *
  * The param value sets the method used to calculate the yaw rate
  * 0: open-loop zero lateral acceleration based on kinematic constraints
+ * 1: closed-loop: try to reduce lateral acceleration to 0 by measuring the acceleration
  *
  * @min 0
- * @max 0
+ * @max 1
  * @unit m/s
  * @group FW Attitude Control
  */