add timestamp to hazard_light_command topic

Signed-off-by: veqcc <ryuta.kambe@tier4.jp>

Author: veqcc

system/mrm_handler/src/mrm_handler/mrm_handler_core.cpp

@@ -168,6 +168,7 @@ void MrmHandler::publishHazardCmd()
   using autoware_auto_vehicle_msgs::msg::HazardLightsCommand;
   HazardLightsCommand msg;
 
+  msg.stamp = this->now();
   if (is_emergency_holding_) {
     // turn hazard on during emergency holding
     msg.command = HazardLightsCommand::ENABLE;