Update code based on new versions and fixes

[martin-martin]

Where to put new files:

• New files should go into a top-level subfolder, named after the article slug. For example: my-awesome-article

How to merge your changes:

1. Make sure the CI code style tests all pass (+ run the automatic code formatter if necessary).
2. Find an RP Team member on Slack and ask them to review & approve your PR.
3. Once the PR has one positive ("approved") review, GitHub lets you merge the PR.
4. 🎉

[martin-martin]

Adds a few things:

1. requirements.txt with updated package versions
2. better regex matching (propagated from tutorial update code)
3. changed column ordering (pandas 3.0 doesn't reorder)