[ANN] U-Boot v2023.01-rc4 released

Hey all,

Here's -rc4, on schedule. I believe this should resolve the case Fedora showed where some binaries are allowed to be missing, IF a flag is also passed to make. We've got one more patch to make external optional binaries be more clearly supported, to pull in still.

In terms of a changelog, git log --merges v2023.01-rc3..v2023.01-rc4 contains what I've pulled but as always, better PR messages and tags will provide better results here.

Looking forward, the schedule is for now rcs every other Monday, and with final release on January 9th, 2023. Thanks all!