doc: add yashLadha to collaborator

Fixes: https://github.com/nodejs/node/issues/36500

PR-URL: https://github.com/nodejs/node/pull/36666



Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Pooja D P <Pooja.D.P@ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>