Add Bill Bejeck as PMC member (#349)

* update profile

* fix spelling
diff --git a/committers.html b/committers.html
index 42a5f1f..fca3a27 100644
--- a/committers.html
+++ b/committers.html
@@ -254,7 +254,7 @@
         </td>
         <td>
           Bill Bejeck<br>
-          Committer<br>
+          Committer, and PMC member<br>
           <a href="https://www.linkedin.com/in/bbejeck/">/in/bbejeck</a><br>
           <a href="https://twitter.com/bbejeck">@bbejeck</a>
         </td>