Adding project owners to refs/meta/config

Change-Id: I2a4be6a9d44243033f367dec0c5a8cb6eae002ee
diff --git a/project.config b/project.config
index 38e31db..6083720 100644
--- a/project.config
+++ b/project.config
@@ -90,5 +90,6 @@
 	publishDrafts = group Registered Users
 [access "refs/for/refs/meta/config"]
 	push = group Administrators
+	push = group Project Owners
 [access "refs/for/*"]
 	addPatchSet = group Registered Users