Fix documentation: offset instead of marker
Fix documentation: offset instead of marker

Change-Id: Ic746b5fdb443f1663d258f50dfadef85cd032d57

szaher/freezer-api,szaher/freezer-api,szaher/freezer-api,szaher/freezer-api,openstack/freezer-api,openstack/freezer-api,openstack/freezer-api,openstack/freezer-api