Fix typo in Install-guide.rst file
Fix typo in Install-guide.rst file

Change-Id: I0e33ad57c8bf192d5511efd115dd3a6b79bed849

pshchelo/ironic,SauloAislan/ironic,SauloAislan/ironic,NaohiroTamura/ironic,openstack/ironic,NaohiroTamura/ironic,openstack/ironic,pshchelo/ironic