Broken example links

[bric-afisher]

PyTrial/docs/source/tutorials/drug_kg.rst

Line 17 in a0d056e

A colab example is available at `demo_drug_utils.ipynb <https://github.com/RyanWangZf/PyTrial/blob/main/examples/model_utils/demo_drug_utils.ipynb>`_.

Thank you for creating this extensive package!

It seems like the docs linked here are out of date; it leads to a 404 error. Is there an updated link?