Fix link to Concourse create-cloudfoundry health group in smoke test failures
Fix link to Concourse create-cloudfoundry health group in smoke test failures

When a smoke test fails, we get an email like this:
`The smoke tests have failed in environment prod-lon. See Concourse for details`
With `Concourse` being a link to e.g. https://deployer.london.cloud.service.gov.uk/teams/main/pipelines/create-cloudfoundry?groups=health
But that URL doesn't work, it should be https://deployer.london.cloud.service.gov.uk/teams/main/pipelines/create-cloudfoundry?group=health

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf