document Client CLI kn domain

[csantanapr]

The new version of the kn CLI container a new command domain

The info is included in the release notes but it should properly be documented in the website

It was suggested by @abrennan89 to open an issue in the PR for the release notes blod here

@csantanapr can you please open a docs issue for kn domain to get it properly documented in the site so it's not only explained here?

/assign @rhuss

[rhuss]

Is this something I could actively drive or is it more about delivering input for the documentation and the docs creation happens by somebody else ?

Happy to do either, if I know where to put this documentation to.

[abrennan89]

Note to self: Related to knative/ux#39

[abrennan89]

@rhuss either is fine - do you have draft info for docs for this, or want to take this issue and add a PR yourself?

[rhuss]

Let me pick this issue and write a documentation PR.

[snneji]

/priority high

[abrennan89]

Bump @rhuss - any progress on this one? Thanks!