Fix typo in README
Fix typo in README

Change-Id: If165635e3cf73488b305d0b2c4fc9515b7a0849f
Signed-off-by: Julien Danjou <02b9c1d548d177421b793c726ed68b7aac9b5a66@enovance.com>

mat128/python-novaclient,akash1808/python-novaclient,metacloud/python-novaclient,citrix-openstack-build/python-novaclient,guptaankita/python-novaclient,JioCloud/python-novaclient,CCI-MOC/python-novaclient,ntt-sic/python-novaclient,takeshineshiro/python-novaclient,Shihta/python-novaclient,mat128/python-novaclient,metacloud/python-novaclient,Shihta/python-novaclient,CCI-MOC/python-novaclient,akash1808/python-novaclient,citrix-openstack-build/python-novaclient,takeshineshiro/python-novaclient,ntt-sic/python-novaclient,JioCloud/python-novaclient,guptaankita/python-novaclient