[contributor] Update the leader of HA guide
[contributor] Update the leader of HA guide

Change-Id: Ib70e4d90db5120bc3a45155ea029da55f8f70e20

openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals