[ops-guide] Update networking guide link
[ops-guide] Update networking guide link

Change-Id: I1626438b76cf9d3bf23e4b9cabfd434c7f44a42a

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