Add link to Github Cheatsheet

index.html

@@ -38,7 +38,7 @@ layout: base
     <ol>
       <li><a class="btn btn-primary" href="https://github.com/p2pu/jekyll-course-experiment/fork"><i class="fa fa-code-fork"></i> Fork this repository on GitHub.</a></li>
       <li>Edit <a href="https://github.com/p2pu/jekyll-course-experiment/blob/gh-pages/_data/course.yml">_data/course.yml</a> and add your name, image URL and Twitter handle.</li>
-      <li>Submit a pull request to get your changes merged into the main version of the course and have your mug show up here! See <a href="https://github.com/p2pu/jekyll-course-experiment/pull/1">this pull request</a> for an example.</li>
+      <li>Submit a pull request to get your changes merged into the main version of the course and have your mug show up here! Not sure how to submit a pull request? See the <a href="{{site.baseurl}}{% post_url 2000-01-02-github-cheatsheet %}">GitHub Cheatsheet</a>.</li>
     </ol>
     <h2>Who is P2PU?</h2>
     <p>We believe the future of learning is passionate, playful and happens with other people. We’re the team behind courses like Play With Your Music, Learning Creative Learning, the Deeper Learning MOOC, and A Gentle Intro to Python. We build assessments via feedback and interactions. Also, we’re grassroots and a non-profit.</a>