>>102959421Not OP, but it's her chin. It became sharper and more defined. Probably to look older.
The angles I took aren't perfectly comparable, but if you want to see it for yourself, watch
(old)
https://www.youtube.com/watch?v=H_Nc-zjRmK4(new)
https://www.youtube.com/watch?v=h3jBOcBn_tUJust pay attention to their chins while skipping through the video.
The old one has a barely noticable chin, while the new one has her chin showing all the time.