Speed reset when switching flight modes (#21414)

* speed reset between flight modes

* no whitespace

src/modules/navigator/land.cpp

@@ -65,6 +65,9 @@ Land::on_activation()
 	_navigator->set_can_loiter_at_sp(false);
 
 	_navigator->set_position_setpoint_triplet_updated();
+
+	// reset cruising speed to default
+	_navigator->reset_cruising_speed();
 }
 
 void