Pin requests dependency to work around docker-py incompatibility

[felddy]

🗣 Description

Pin requests to work around an incompatibility with docker Python API.

💭 Motivation and context

I normally would wait this out, but FoundryVTT just released version 12.
This can be reverted once the PR below is released by Docker.

See:

• Fix for requests 2.32 docker/docker-py#3257

🧪 Testing

Locally and in CI.

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All relevant repo and/or project documentation has been updated
  to reflect the changes in this PR.
• All new and existing tests pass.