Traffic light detection topic content changes

[hzkkk1997]

I have been using autoware.universe for learning, but I found that there seemed to be some changes in the content of topic /perception/traffic_light_recognition/traffic_signals sent from the traffic light recognition module to the planning module. The previous version said traffic_light_id, but now version v1.0 says the id of regulatory_element for traffic lights. May I ask why there is such a modification? What are the reasons for making such a change?