Fix wrong semantic markup
Fix wrong semantic markup

On building the translated guide, the below error occurs:

  WARNING: Malformed :option: u'KeyName', does not contain
  option marker - or -- or / or +

Change-Id: I67b70621d76daeb46ba90b6a54ef15d5fd677a64

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