Decrease default flare altitude. The previous value was way too high for any...

Decrease default flare altitude. The previous value was way too high for any small aircraft. It was also unsafe because after the flar, pitch is currently controlled open-loop, which means that stall can potentially happen during the flare

src/modules/fw_pos_control_l1/fw_pos_control_l1_params.c

@@ -278,7 +278,7 @@ PARAM_DEFINE_FLOAT(FW_LND_HVIRT, 10.0f);
  * @increment 0.5
  * @group FW L1 Control
  */
-PARAM_DEFINE_FLOAT(FW_LND_FLALT, 8.0f);
+PARAM_DEFINE_FLOAT(FW_LND_FLALT, 3.0f);
 
 /**
  * Landing throttle limit altitude (relative landing altitude)