CI not passing

[t-kimber]

Is the CI on your new talktorial not passing the CI tests?

Here's a list of things you can try:
Assuming you are in the teachopencadd folder:

• For the black test, run the following: black-nb -l 99 teachopencadd/
• For the README test, run the following:

for path in teachopencadd/talktorials/T*/talktorial.ipynb; do
    python devtools/regenerate_readmes.py --output README.md $path
done

• For Python versions: you could ignore timeout errors.
• Docs: mmhhh.. read the errors.