[www-ko_KR] Links to I18n Korean contributor guide
[www-ko_KR] Links to I18n Korean contributor guide

Change-Id: I4a55fd745bd7df9e26e2913ad952201365f8e29d
Closes-Bug: #1710786

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