This should make it easier to update all examples in once change and
potentially automate this change.

Benjamin Gilbert authored Sep 13, 2022 and Benjamin Gilbert committed Sep 13, 2022

"Keymap" is a bit jargony.  Introduce the subject with the phrase
"keyboard layout" instead, but keep the last "keymap" reference because
that's what localectl calls it.

Fixes https://github.com/coreos/fedora-coreos-docs/issues/454.

This removes some spurious SSH keys stubs, not relevant to the actual
configuration fragment.