[cli-ref] Update python-neutronclient to instead. 6.1.0
[cli-ref] Update python-neutronclient to instead.
6.1.0

Change-Id: Idaa23a8413aff2f0018cf94b4e6d6fe1256639ed

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals