Is this a "substantial" update? Forget about it, too late?

Yale/Princeton both have places you can send updates about your application for. Art was a major part of my application, and I recently learned that I had my work chosen to be displayed in the U.S Capitol as a national winner.
Is it way too late or is that “substantial” info? Even if I’m already decided, it can’t hurt to send it, right?

(has decided not to send it)

I’d send it. What can it hurt?

(ended up sending it shrug)