fix hazel href

Author: stevekrouse

Diff for: catalog/hazel.html

@@ -56,7 +56,7 @@ <h2 id="collaboration">Collaboration</h2>
       <section>
         <h2 id="further-reading">Further Reading</h2>
         <ul>
-          <li><a href=""http://hazel.org/>The Hazel Project Website</a></li>
+          <li><a href="http://hazel.org/">The Hazel Project Website</a></li>
           <li><a href="https://futureofcoding.org/episodes/039">Future of Coding Episode 39 - Mathematical Foundations for the Activity of Programming: Cyrus Omar</a></li>
         </ul>      
       </section>
@@ -70,4 +70,4 @@ <h2 id="further-reading">Further Reading</h2>
       ga('send', 'pageview');
     </script>
   </body>
-</html>
+</html>