Docs feedback: Unclear instructions on installing cert-manager via cluster-management

Link the doc and describe what is wrong with it. https://docs.gitlab.com/14.2/ee/user/infrastructure/clusters/manage/management_project_applications/certmanager.html

This document still refers to the "old" setup of cluster-management (.gitlab/managed-apps/cert-manager/values.yaml).

As well, it feels like the code snippet under

The following configuration in your applications/cert-manager/helmfile.yaml is required to install cert-manager:

certManager:
  installed: true
  letsEncryptClusterIssuer:
    installed: true
    email: "user@example.com"

is in the "old" style as well. If it's not, it's very unclear where in the helmfile.yaml to insert this. Is this still required? Or will it suffice to simply set the following in applications/cert-manager/helmfile.yaml?:

- name: certmanager-issuer
  ...
  values:
    - letsEncryptClusterIssuer:
        email: my@email.com

Thanks in advance,
Joris