Merge pull request #131 from LibraryCarpentry/128-replace-optional-challenge-link

link to GitHub guide on contributing to a project

Author: emcaulay

episodes/05-github-pages.md

@@ -118,15 +118,15 @@ Usually it's available instantly, but it can take a few seconds and in the worst
 > Instead of making edits on the GitHub website you can 'clone' the fork to your local machine
 > and work there.
 >
-> Try following the rest of the steps under "Time to Submit Your First PR"
-> at this guide: <https://www.thinkful.com/learn/github-pull-request-tutorial/Writing-a-Good-Commit-Message#Time-to-Submit-Your-First-PR>
+> Try following the steps in [GitHub's quickstart guide for contributing to projects](https://docs.github.com/en/get-started/quickstart/contributing-to-projects)
 >
-> (If you followed step 1 and 2 in the previous challenge, you already have a fork and you can
-> skip the creation of a new fork if you like. You can submit multiple pull requests using the same fork.)
+> (If you followed step 1 and 2 in the previous challenge,
+> you already have a fork and you can skip the creation of a new fork. 
+> Start instead at the section titled "Cloning a fork." 
+> You can submit multiple pull requests using the same fork.)
 >
 {: .challenge}
 
-
 > ## Optional challenge: Adding an HTML page
 >
 > GitHub Pages is not limited to Markdown. If you know some HTML, try adding an HTML page