Igor Kuvychko

Re-wrote "How to debug a model"

9

**References** - Towards https://github.com/pymc-devs/pymc-examples/issues/109 - References Project Board: https://github.com/pymc-devs/pymc-examples/projects/1 - [x] Notebook follows style guide https://docs.pymc.io/en/latest/contributing/jupyter_style.html - [x] PR description contains a link to the relevant issue: a tracker one...