In essential brush assets, the "Crease" brush was replaced with two
crease brushes ("Crease Polish" and "Crease Sharp"), but the keymap
wasnt respecting that.
So to resolve now point Shift+C to "Crease Polish" (seems closer to what
the former "Crease" brush was.
Pull Request: https://projects.blender.org/blender/blender/pulls/128765