website: add Zehua Zou to the list of committers (#809)

Author: HuaHuaY

_data/committers.yml

@@ -496,3 +496,7 @@
   role: Committer
   alias: yjshen
   affiliation: Space and Time
+- name: Zehua Zou
+  role: Committer
+  alias: zehuazou
+  affiliation: Singdata