I'm not aware of the other person that did it but it's pretty simple to do. Open the CT file in a text editor and there's a list of drivers and their id (for example I believe the first one is "0:Carlos Sainz").
All you need to do is add in the new 2023 F2 drivers with their IDs, they correspond to 145-153 so at the end of the list just add
145:Zane Maloney
146:Victor Martins
147:Oliver Bearman
148:Jak Crawford
149:Isack Hadjar
150:Arthur Leclerc
151:Brad Benavides
152:Roman Stanek
153:Kush Maini