Update set-up-git.md

[armandsl]

Why:

What's being changed:

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[armandsl]

Reviewed

[janiceilene]

Thanks for opening a PR @armandsl! The additional word isn't necessary in this sentence, so I'm going to close this out.

Next time, please fill out the pull request template in the top comment in the pull request, so we can better understand your changes.