[bootlin/training-materials] 3f344d: common: scheduling-classe: Fix typo

[hcodina]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 3f344dc77715f68a80661a16887c76f050d91eed
      https://github.com/bootlin/training-materials/commit/3f344dc77715f68a80661a16887c76f050d91eed
  Author: Herve Codina <herve.codina at bootlin.com>
  Date:   2022-11-14 (Mon, 14 Nov 2022)

  Changed paths:
    M common/scheduling-classes.tex

  Log Message:
  -----------
  common: scheduling-classe: Fix typo

Signed-off-by: Herve Codina <herve.codina at bootlin.com>