Automation: How to detect when "HA Host" is shutdown, NOT "HA Core"!

I am trying to make a simple automation to detect when Home Assistant “Host” is shutting down. However, the only automation trigger I can find (below); appears to get triggered for both “Core” and “Host”.
Screenshot 08-01-2023 at 12.05.39 PM

How do I setup a trigger to detect when the entire host is being shutdown specifically?