Discuss: whether to add notebook update on when notebooks were transferred from pymc

Notebook title: generally, most
Notebook url: generally, most

Issue description

In updating the notebooks and the "Author" section, I have been adding this information:

## Authors
* Moved from pymc to pymc-examples repo in December 2020 ([pymc-examples#8](https://github.com/pymc-devs/pymc-examples/pull/8))

Some notebooks have been merged with this updates, and other(s) are under discussion.
See: https://github.com/pymc-devs/pymc-examples/pull/426/files#r984794260

@OriolAbril

I would not include this here

@reshamas:

Are you sure we should remove this? I've added it in for other notebooks. I think it helps folks know that to look for prior commits on the notebook, they can find some history in the other repo.

Note

Can we discuss and agree on a consistent rule?

Start by reviewing the notebook Author-section examples described in this issue, the transfer history in pymc-examples#8, and the discussion on pull request #426. Clarify whether transfer history belongs in notebooks and document the agreed consistent rule; done means the project has a decided policy and affected notebooks follow it.