Clarify that foreman_scap_client is included in client repo

[aneta-petrova]

https://community.theforeman.org/t/unable-to-install-foreman-scap-client/42039 reports an issue in the foreman_scap_client manual:

It is important to make sure foreman_scap_client package is available to your client system. Foreman plugins repo can be optionally enabled using the appropriate parameters/variables. The repo is disabled by default as users may prefer to use their own mirror.

Feedback:

That’s an unfortunate wording, foreman_scap_client lives in the client repo[1]. You shouldn’t really enable the plugin repo on the clients. And of course, we’ll fix that in the docs, thank you for pointing it out.

I'd like to try to fix those docs.

[aneta-petrova]

Hi @adamruzicka, would this work?

[maximiliankolb]

style-wise LGTM; tech wise: also makes sense to me.

[ekohl]

@adamruzicka since you had feedback before, I'll leave it up to you.

[adamruzicka]

This is good, but I don't have the green button pressing permissions here