docs: Fix broken PR guideline hyperlink

Author: pcw109550

CONTRIBUTING.md

@@ -30,7 +30,7 @@ We recommend using the [Conventional Commits](https://www.conventionalcommits.or
 
 Unless your PR is ready for immediate review and merging, please mark it as 'draft' (or simply do not open a PR yet).
 
-Once ready for review, make sure to include a thorough PR description to help reviewers. You can read more about the guidelines for opening PRs in the [PR Guidelines](./handbook/pr-guidelines.md) file.
+Once ready for review, make sure to include a thorough PR description to help reviewers. You can read more about the guidelines for opening PRs in the [PR Guidelines](docs/handbook/pr-guidelines.md) file.
 
 **Bonus:** Add comments to the diff under the "Files Changed" tab on the PR page to clarify any sections where you think we might have questions about the approach taken.