Update image source in people.html

Author: AaronFeller

people.html

@@ -2,7 +2,7 @@
 layout: page
 title: People
 permalink: /people
-image: /img/LabPictureOct2018.jpg
+image: /img/wilkelab.jpg
 ---
 <div class="people-image" style="background-image: url({{ page.image | prepend: site.baseurl }});">
 </div>
@@ -75,4 +75,4 @@ <h2>Past group members</h2>
     {% endif %}
   </div>
   {% endfor %}
-</div>
+</div>