fix a spelling error, closes 1284770
fix a spelling error, closes 1284770

Change-Id: I5178463bf77f245e4f9c1e067636fca465b882e3

openstack/openstack-manuals,kairoaraujo/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,saeki-masaki/openstack-manuals,gongysh2004/openstack-manual,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,gongysh2004/openstack-manual,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,saeki-masaki/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals