docs: fix Ansible metrics reference

Description of the change:

Adds appropriate metadata to Ansible's metrics doc to have it linked on the website.

https://sdk.operatorframework.io/docs/building-operators/ansible/reference/internal_metrics/

Motivation for the change:

Linking on navbar.

Checklist

If the pull request includes user-facing changes, extra documentation is required:

• [ ] Add a new changelog fragment in changelog/fragments (see changelog/fragments/00-template.yaml)
  • not required
• [X] Add or update relevant sections of the docs website in website/content/en/docs

The CI errors do not seem to be relevant to this change:

   *  External link https://gohugo.io/templates/404/ failed: got a time out (response code 0)
  *  External link https://v1-14-x.sdk.operatorframework.io failed: got a time out (response code 0)
- /target/docs/building-operators/ansible/reference/webhooks/index.html
  *  External link https://v1-21.docs.kubernetes.io/docs/reference/generated/kubernetes-api/v1.21/#mutatingwebhookconfiguration-v1-admissionregistration-k8s-io failed: got a time out (response code 0)
  *  External link https://v1-21.docs.kubernetes.io/docs/reference/generated/kubernetes-api/v1.21/#validatingwebhookconfiguration-v1-admissionregistration-k8s-io failed: got a time out (response code 0)
- /target/docs/contribution-guidelines/documentation/index.html
  *  External link https://gohugo.io/ failed: got a time out (response code 0)

I'm going to close and reopen this PR to rerun the checks.

/cc @asmacdo @jmrodri Would either of you mind taking a quick look at this to get it merged?

/retest