[faiproject/fai] 10e9a2: move libgraph-perl to suggested packages

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: 10e9a2c185a2c1e5051e872c2c6634375cbef18f
      https://github.com/faiproject/fai/commit/10e9a2c185a2c1e5051e872c2c6634375cbef18f
  Author: Thomas Lange <lange at debian.org>
  Date:   2022-05-27 (Fri, 27 May 2022)

  Changed paths:
    M debian/control

  Log Message:
  -----------
  move libgraph-perl to suggested packages