Add zra@google.com to OWNERS

Change-Id: I460021cfe6288fbe4d090a521be30b0411dadfff
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/30206
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Commit-Queue: Zach Anderson <zra@google.com>
diff --git a/OWNERS b/OWNERS
index a40ff32..40721bb 100644
--- a/OWNERS
+++ b/OWNERS
@@ -6,5 +6,6 @@
 godofredoc@google.com
 keyonghan@google.com
 mohsinally@google.com
+zra@google.com
 
 per-file infra/config/recipes.cfg=flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com