Follow-up from "Update Helm Chart docs from CE - docs"
The following discussions from !2871 should be addressed:
- [ ] @axil started a [discussion](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2871#note_39719413):
> Use relative URLs.
- [ ] @axil started a [discussion](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2871#note_39719474):
> Relative URL to Container Registry!
- [ ] @axil started a [discussion](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2871#note_39719588):
> Better use the the docs site here https://docs.gitlab.com/runner/executors/kubernetes.html.
issue