Update pull request template

[d33bs]

Description

This PR makes a small change to the PR templates. I felt that "feature" and "enhancement" are overlapping, and that there's no documentation option, so replaced one of the checkbox options. I've manually adjusted the content found within this PR description.

Thanks for any feedback you may have!

What kind of change(s) are included?

• [x] Documentation
• [ ] Bug fix (fixes an issue).
• [ ] Enhancement (adds functionality).
• [ ] Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

Please ensure that all boxes are checked before indicating that this pull request is ready for review.

• [x] I have read and followed the CONTRIBUTING.md guidelines.
• [x] I have searched for existing content to ensure this is not a duplicate.
• [x] I have performed a self-review of these additions (including spelling, grammar, and related).
• [x] These changes pass all pre-commit checks.
• [ ] I have added comments to my code to help provide understanding
• [ ] I have added a test which covers the code changes found within this PR
• [x] I have deleted all non-relevant text in this pull request template.

[d33bs]

Thanks @jenna-tomkinson! Merging this in.