Update index.html

Oxford comma.

Author: dhil

index.html

@@ -96,7 +96,7 @@ <h2>Publications</h2>
 	  </li>
 	  <li>
             <a href="https://arxiv.org/abs/1807.01948">Incremental Relational Lenses</a>.
-            Rudi Horn, Roly Perera and James Cheney.
+            Rudi Horn, Roly Perera, and James Cheney.
             <a href="https://conf.researchr.org/home/icfp-2018">ICFP 2018</a>.
 	  </li>
 	  <li>
@@ -151,7 +151,7 @@ <h2>Publications</h2>
           <li>
             <a href="http://homepages.inf.ed.ac.uk/slindley/papers/dbwiki-dbpl2011.pdf">
             DBWiki: a database wiki prototyped in Links</a>.
-            James Cheney, Sam Lindley and Heiko Müller.
+            James Cheney, Sam Lindley, and Heiko Müller.
             In the proceedings of
             <a href="http://www.cs.cornell.edu/conferences/dbpl2011/">DBPL 2011</a>.
           </li>