Add jojwang to OWNERS

Change-Id: I47961f3208a22cc05b5a38db3ccfd38a0f32520f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3808331
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Gavin Mak <gavinmak@google.com>
Auto-Submit: Joanna Wang <jojwang@chromium.org>

OWNERS

@@ -3,6 +3,7 @@ set noparent
 ajp@google.com
 aravindvasudev@google.com
 gavinmak@google.com
+jojwang@google.com
 sokcevic@google.com
 
 per-file ninja*=thakis@chromium.org