Fire automation when light intensity is changed?

So I have this automation that turns on a dim light at night when it detects movement and no lights are on. The light turns back off after a minute when a timer expires. Also, that timer is cleared if the light is turned off then on (ie, stops that timer from turning off the light).

It’s working like I want but now I also want to clear that timer if the light intensity is manually changed (it’s connected to a smart dimmer). How do set up an automation trigger on a dimmer change? I Googled it and couldn’t find how to do it.