[bootlin/training-materials] f6ca07: sysdev: slides: fix typo

[Luca Ceresoli]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: f6ca07c930a4566b90619d716dfee1905732fa47
      https://github.com/bootlin/training-materials/commit/f6ca07c930a4566b90619d716dfee1905732fa47
  Author: Luca Ceresoli <luca.ceresoli at bootlin.com>
  Date:   2022-12-14 (Wed, 14 Dec 2022)

  Changed paths:
    M slides/sysdev-block-filesystems/sysdev-block-filesystems.tex

  Log Message:
  -----------
  sysdev: slides: fix typo

Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>