[bootlin/training-materials] ca87a7: sysdev/kernel: sources: Fix typo

[Miquèl Raynal]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: ca87a7837d3b40cb172a4f6d1a80a478467196ed
      https://github.com/bootlin/training-materials/commit/ca87a7837d3b40cb172a4f6d1a80a478467196ed
  Author: Miquel Raynal <miquel.raynal at bootlin.com>
  Date:   2022-10-11 (Tue, 11 Oct 2022)

  Changed paths:
    M slides/sysdev-linux-intro-sources/sysdev-linux-intro-sources.tex

  Log Message:
  -----------
  sysdev/kernel: sources: Fix typo

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>