README: this files is a copy  in /lib/firmware/amd-ucoode/README in
the linux-firmware source tree:
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/amd-ucode/README
when the package was built.
Caveat: the AMD-SEV firmware files are not shipped in the Slint package.

README.Debian: copy of the file bearing the same name in this source archive:
https://deb.debian.org/debian/pool/non-free-firmware/a/amd64-microcode/amd64-microcode_3.20230808.1.1.tar.xz

LICENSE.amd-ucode:  copy of the file bearing the same name in this source archive:
https://deb.debian.org/debian/pool/non-free-firmware/a/amd64-microcode/amd64-microcode_3.20230808.1.1.tar.xz