fix a small errors.
Change-Id: I96c16e137a0c32552b8985b1444aecc86e816e3f
(cherry picked from commit c02a073c52)
OpenStack Placement Documentation README
Configuration, contributor, install, and usage documentation is sourced here and built to: https://docs.openstack.org/placement/latest/
Note that the Placement API reference is maintained under the
/api-ref directory and built to: https://docs.openstack.org/api-ref/placement/