docs: updates CONTRIBUTING.md with minor fixes

[jpower432]

Description

There is a broken link and the information about how the linting checks could be run are unclear.

Type of change

• This change requires a documentation update

How has this been tested?

Docs Only

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• 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
• Any dependent changes have been merged and published in downstream modules

[beatrizmcouto]

minor updated, approved

[beatrizmcouto]

link update, all looking good