image link for "fixed notebook" needs to be updated

[reshamas]

this page is invalid:
https://docs.pymc.io/projects/examples/en/2022.01.0/generalized_linear_models/GLM-model-selection.html

https://pymc-data-umbrella.xyz/en/latest/about/contributing_to_documentation/docs_presentation.html

cc: @OriolAbril, I am not sure how to update this image