uavcan: use px4 timestamp for the esc status message

- there is a timeshift between the esc and px4 time so until there is some
kind of offset estimation we are better off using px4 time since the logging
system uses that as reference

Signed-off-by: Roman <bapstroman@gmail.com>

src/drivers/uavcan/actuators/esc.cpp

@@ -203,7 +203,7 @@ void UavcanEscController::esc_status_sub_cb(const uavcan::ReceivedDataStructure<
 {
 	if (msg.esc_index < esc_status_s::CONNECTED_ESC_MAX) {
 		_esc_status.esc_count = uavcan::max<int>(_esc_status.esc_count, msg.esc_index + 1);
-		_esc_status.timestamp = msg.getMonotonicTimestamp().toUSec();
+		_esc_status.timestamp = hrt_absolute_time();
 
 		auto &ref = _esc_status.esc[msg.esc_index];