Pin AgileRL version

[dm-ackerman]

Description

The new version breaks the tutorial. Pinning to the previous version.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have run pytest -v and no errors are present.
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I solved any possible warnings that pytest -v has generated that are related to my code to the best of my knowledge.
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[dm-ackerman]

I was going to update the files to match the new version of AgileRL, which seemed straightforward. But it ended up also changing the trained models that are in the repo. I don't know whether that is supposed to happen, so I decided to just pin the version instead.

I'm not sure if we actually need those models to be stored in the repo.