Do not lint new cf-deployment YAML templates
Do not lint new cf-deployment YAML templates

The `manifests/cf-deployment/ci/template` folder contains a `.yml`
file that isn't valid YAML. The file is a template with anchors for
variable substitutions. This made our tests fail when we upgraded
`cf-deployment` and gained our file. This commit excludes that folder
from YAML linting.

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