Update index.html

Author: stevekrouse

index.html

@@ -76,6 +76,7 @@ <h3>Future of Coding</h3>
     <div>
       <h4>Episodes</h4>
       <ul class="list-unstyled">
+        <li><span class="date">2016 Jul 21 - </span><a target="_blank" href="./episodes/3-jonathan-leung-on-inventing-on-principle.html">Jonathan Leung on Inventing on Principle</a></li>
         <li><span class="date">2016 Jul 16 - </span><a target="_blank" href="./episodes/research-recap.html">Research Recap</a></li>
         <li><span class="date">2016 Jul 14 - </span><a target="_blank" href="./episodes/welcome.html">Welcome to the Future of Coding</a></li>
       </ul>