[Bug 1010477] Using own certificates/keys with SecureBoot isn't documented enough

https://bugzilla.redhat.com/show_bug.cgi?id=1010477

--- Comment #5 from Marek Suchánek  ---
We are now working on this documentation for RHEL. The plan is to publish it
with the RHEL 8.5 release.

See the cloned RHEL bug: BZ#1912408