Correct wrong reference in docs
Correct wrong reference in docs

This change fixes the wrong url in nova compute admin doc [1]
in projects-users-and-roles section.

[1] https://docs.openstack.org/api-guide/compute/users.html

Closes-Bug: #1992139
Change-Id: Iee3546845bb37ad08f394ec710f7302d37ffd99b

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