Correct a spelling error in quickstart guide.
Correct a spelling error in quickstart guide.

Change-Id: I72a699d45a62f4a51576a8ab507a9592ee00cf54
Closes-Bug: 1454412

ramielrowe/magnum,ddepaoli3/magnum,Alzon/SUR,LaynePeng/magnum,sajuptpm/magnum,Tennyson53/SUR,mjbrewer/testindex,openstack/magnum,hongbin/magnum,mjbrewer/testindex,ffantast/magnum,LaynePeng/magnum,openstack/magnum,Tennyson53/magnum,hongbin/magnum,ramielrowe/magnum,paulczar/magnum,dimtruck/magnum,eshijia/SUR,ddepaoli3/magnum,annegentle/magnum,Tennyson53/SUR,sajuptpm/magnum,mjbrewer/testindex,ArchiFleKs/magnum,ArchiFleKs/magnum,Alzon/SUR,ffantast/magnum,eshijia/magnum,ChengTiesheng/magnum,eshijia/magnum,eshijia/SUR,dimtruck/magnum,annegentle/magnum,ChengTiesheng/magnum,paulczar/magnum,jay-lau/magnum,Tennyson53/magnum