Add uefi to workspace members

[nicholasbishop]

I'm confused as to how this hasn't caused problems to be missing -- like why does cargo fmt --all work for the uefi crate even though it was missing from this list?

Checklist

• Sensible git history (for example, squash "typo" or "fix" commits). See the Rewriting History guide for help.
• Update the changelog (if necessary)

[phip1611]

All path dependencies residing in the workspace directory automatically become members.

--- https://doc.rust-lang.org/cargo/reference/workspaces.html

That's probably what happened here

[nicholasbishop]

Thanks, makes sense. I was scratching my head over this :)