Describe the use of Review-Priority label
Describe the use of Review-Priority label

Depends-On: https://review.opendev.org/c/openstack/project-config/+/787523
Change-Id: Icc5133372a41cf611ea4784e9616fcadddbc2c47

openstack/nova,openstack/nova,mahak/nova,openstack/nova,mahak/nova,mahak/nova