Mostly just the result of running `blender_icons_update.py` without adding or changing any icon source files. Removal of three unused icons and adding three others to the project to resolve conflicts between them.
Pull Request: https://projects.blender.org/blender/blender/pulls/114874
New icons from Andrzej Ambroż / jendrzych:
-Adds separate icons for 3D Cursor orientation and pivot
Also, many dozens of tweaks and updates - too many to mention here.
Full list is on Devtalk