CONTRIBUTORS: change my name

Change-Id: Id7706d9505d3f770390ec3180ae77a2eb3753827
Reviewed-on: https://go-review.googlesource.com/c/gollvm/+/317891
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b46eeae..13b44ee 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -26,7 +26,7 @@
 
 # Please keep the list sorted.
 
-Cherry Zhang <cherryyz@google.com>
+Cherry Mui <cherryyz@google.com>
 Ian Lance Taylor <iant@golang.org>
 Than McIntosh <thanm@google.com>