The King's Shilling Update is an update for Total War: Warhammer II which released on the 5th of February 2020. It followed the Potion of Speed Update.
It was a smaller update that was not accompanied by DLC or Free-LC, it fixed a number of priority bugs and issues.
Patch notes
Patch notes can be found here: https://www.totalwar.com/blog/total-war-warhammer-ii-the-kings-shilling-update/