fix PR guide link

[hwacc-y]

closes #234

Summary of changes

Fixed the link to the Pull Request Guide.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] I have read the CONTRIBUTING document.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

Associated Issues and PRs

Associated Developers

• Dev: @

Checklist for Reviewers

Reviewers should use this link to get to the Review Checklist before they begin their review.

[nsryan2]

Thanks for this fix @hwacc-y! Looks good to me.