Move doc location to the new structure
Move doc location to the new structure

During the doc migration spec, the location of published document
is changed to /<project>/latest. The i18n guide is now published
in their own way, so we need to switch the new location manually.

Change-Id: I2d4c885810a60db19af6fdf93d1ee8d7a8f81142

openstack/i18n,openstack/i18n