[www] Update Japanese image guide
[www] Update Japanese image guide

Change-Id: I3599792f6d89b4a090eea58eff70d03c63c29d5e

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