:wrench: Slightly reduce lift

Take-off is facilitated by wheels, slightly incling the plane to the
air.

godot/component/entity/vehicles/biplan/biplan.gd

@@ -8,7 +8,7 @@ const PLANE_FORWARD := Vector3.BACK # z increases when moving forward
 @export var move_to_pitch: float = 2000.0
 @export var wing_resistance: float = 2500.0
 @export var foil_resistance: float = 250.0
-@export var lift: float = 50.0
+@export var lift: float = 25.0
 
 var target_torque: float = 0.0
 var target_pitch: float = 0.0