Update people.html to include Sean's profile

Author: dangerworm

people.html

@@ -11,3 +11,5 @@ <h1>{{page.title}}</h1>
 {% include_relative pages-people/people-keiran.html %}
 <br />
 {% include_relative pages-people/people-liz.html %}
+<br />
+{% include_relative pages-people/people-sean.html %}