[bootlin/training-materials] dcbe54: common/scheduling-classes.tex: misc improvements

[Michael Opdenacker]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: dcbe54fbccfa70d2fbf0ad727e7a86ba05ac0991
      https://github.com/bootlin/training-materials/commit/dcbe54fbccfa70d2fbf0ad727e7a86ba05ac0991
  Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
  Date:   2022-11-28 (Mon, 28 Nov 2022)

  Changed paths:
    M common/scheduling-classes.tex

  Log Message:
  -----------
  common/scheduling-classes.tex: misc improvements

- Elixir link for SCHED_FIFO
- chrt supports "-d" for SCHED_DEADLINE (except in BusyBox chrt)

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