Do you have a source for that change?

Unfortunately NBC's website doesn't list the title for this episode yet but multiple other sources back up the title referenced above.

1. https://www.tvguide.com/listings/ - switch to 9pm on 1/6.
2. My Xfinity guide and DVR schedule.
3. https://thetvdb.com/series/law-and-order-special-victims-unit/episodes/8880412
4. https://www.tvmaze.com/episodes/2212280/law-order-special-victims-unit-23x10-silent-night-hateful-night

Episode title has been updated.

My Xfinity guide and DVR schedule.

I checked the TV guide on my cable box and it does show "Silent Night, Hateful Night" as the title of the episode airing on Jan. 6. Additionally, another moderator added "Burning With Rage Forever" as the title for episode 11 a few days ago.