Document where to assign the Check Code Owner global capability
Document where to assign the Check Code Owner global capability

Signed-off-by: Edwin Kempin <d43fb6c98c97e553b671ed9a9318100f1de386e7@google.com>
Change-Id: Ic33026c33a05d71ca28f6691f3c8703973e199d4

GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners,GerritCodeReview/plugins_code-owners