Fix typo for manila tempest job
Fix typo for manila tempest job

We have two tempest jobs for Manila project at the moment.
And comment for one of them provides incorrect information.

Change-Id: I7019808a0852821b49d3f5380dda060ac664bcd4

coolsvap/project-config,dongwenjuan/project-config,anbangr/osci-project-config,open-switch/infra_project-config,openstack-infra/project-config,Tesora/tesora-project-config,coolsvap/project-config,anbangr/osci-project-config,noorul/os-project-config,Tesora/tesora-project-config,citrix-openstack/project-config,dongwenjuan/project-config,noorul/os-project-config,open-switch/infra_project-config,citrix-openstack/project-config,openstack-infra/project-config