They apparently used some ML to make predictions about the position of the driver and the future position of the vehicle to account for the lag when they pulled the remote trigger from hundreds of miles away.
That's pretty trivial 'AI'. The headline mentioning AI is just for clickbait, in reality it was just a remotely-operated drone gun with a fire control system.
Except maybe because a Kalman filter expects Gaussian inputs, something fancier is used to deal with nonlinear inputs?
https://en.m.wikipedia.org/wiki/Kalman_filter