[faiproject/fai] 75d119: fix example

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: 75d119c35938d0f4775836a77717e76f7fcf8f14
      https://github.com/faiproject/fai/commit/75d119c35938d0f4775836a77717e76f7fcf8f14
  Author: Thomas Lange <lange at debian.org>
  Date:   2023-12-16 (Sat, 16 Dec 2023)

  Changed paths:
    M bin/mk-data-partition

  Log Message:
  -----------
  fix example