upgrade: Fixed typo in Stop Services UI
upgrade: Fixed typo in Stop Services UI

The button said "Servers" instead of "Services". There are no servers
stopped during this step, just services.

skazi0/crowbar-angular,skazi0/crowbar-angular,skazi0/crowbar-angular,skazi0/crowbar-angular,crowbar/crowbar-ui,crowbar/crowbar-ui,crowbar/crowbar-ui,crowbar/crowbar-ui