Update whoweare.md

Add Patrick Zhai to committer list
diff --git a/content/pages/whoweare.md b/content/pages/whoweare.md
index 4aba79e..d8e0727 100644
--- a/content/pages/whoweare.md
+++ b/content/pages/whoweare.md
@@ -89,6 +89,7 @@
 - *Nhat Nguyen* (dnhatn@...)
 - *[Zach Chen](http://www.linkedin.com/in/zacharychen)* (zacharymorn@...)
 - *[Greg Miller](http://www.linkedin.com/in/greg-miller-7399636)* (gsmiller@...)
+- *[Patrick Zhai](https://www.linkedin.com/in/haoyu-zhai-23b226136)* (patrickz@...)
 
 ## Emeritus