[bootlin/training-materials] 7893c4: README: update packages for Ubuntu 22.04

[Michael Opdenacker]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 7893c4400015959035b27ac0b9d46fac933dc764
      https://github.com/bootlin/training-materials/commit/7893c4400015959035b27ac0b9d46fac933dc764
  Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
  Date:   2022-06-09 (Thu, 09 Jun 2022)

  Changed paths:
    M README

  Log Message:
  -----------
  README: update packages for Ubuntu 22.04

Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>