Jupyter authenticator: Path requires update

[hsachdevah]

What are we using this file for?
This path refers to a personal repo & path ray-on-gke/user is no longer being used

ai-on-gke/modules/jupyter/authentication/authenticator/setup.py

Line 25 in b8b72a9

url="https://github.com/chiayi/ai-on-gke/tree/main/ray-on-gke/user/jupyterhub/auth",