link to GitHub guide on contributing to a project

[tobyhodges]

Fixes #128 by replacing the broken link to the Thinkful tutorial with a more up-to-date resource on forking, cloning, and pull requests. Hopefully this guide from GitHub is a safer bet in terms of long-term maintenance and availability.

[ostephens]

Looks good to me. Generally I'd suggest hyperlinks better done with meaningful text rather than just the URL but I see you are just replacing the existing link in the same style. This might be an issue the lesson wants to consider more generally

[ostephens]

Ideally this would be reviewed by a lesson maintainer before it's merged @LibraryCarpentry/lc-git-maintainers

[tobyhodges]

Thank you for the review, @ostephens 🙌

Generally I'd suggest hyperlinks better done with meaningful text rather than just the URL but I see you are just replacing the existing link in the same style.

Honestly, I think the exercise text could be generally expanded and improved. I think that would be a great contribution for someone else in the community to make. I've tried to keep my changes here to a minimum just to remove the broken link, and will open a good-first-issue/help-wanted issue to suggest polishing the exercise.

[emcaulay]

Hi @tobyhodges , I have a minor stylistic revision for you to consider.

[tobyhodges]

Great suggestions, thanks @emcaulay. I have updated the wording and hope this is ready to merge now.

[emcaulay]

Thank you so much for the work to make this improvement!