Fix email

Author: jhill1

index.html

@@ -79,7 +79,7 @@ <h2>Collaborators</h2>
 
         <section>
            <h2>Contact</h2>
-		<p>Please contact <a href="mailto:jonhill@york.ac.uk">Jon Hill</a></p>
+		<p>Please contact <a href="mailto:jon.hill@york.ac.uk">Jon Hill</a></p>
         </section>
     </div>