Comment out image map in default values.yml
What does this MR do?
This MR comments out the image map at the top of the values.yaml example, as the presence of this map causes an error:
Failed to apply default image tag "map[image:gitlab-org/gitlab-runner registry:registry.gitlab.com tag:alpine-v11.6.0]": couldn't parse image reference "map[image:gitlab-org/gitlab-runner registry:registry.gitlab.com tag:alpine-v11.6.0]": invalid reference format
Why was this MR needed?
This MR is needed so that when people follow the documentation to try the Kubernetes runner the defaults will work for thme.