releasetools: Update OWNERS.

Test: N/A
Change-Id: Ie476ff08a360f15f769e54dca7428a2d055f1a37
diff --git a/tools/releasetools/OWNERS b/tools/releasetools/OWNERS
index 766adb4..a8295d4 100644
--- a/tools/releasetools/OWNERS
+++ b/tools/releasetools/OWNERS
@@ -1,2 +1,3 @@
-tbao@google.com
+nhdo@google.com
 xunchang@google.com
+zhaojiac@google.com