DOC: Typo in the Contributions doc

[vedanthv]

Quinn version checks

• [X] I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

contribution guidelines

Documentation problem

Found a typo, the heading should be "Running Tests" instead of "Rinning Tests"

Suggested fix for documentation

Easy fix by correcting the spelling to "Running"

[MrPowers]

Looks good, can you please submit a PR?

[vedanthv]

Sure will do that