[bootlin/training-materials] ebfc6c: labs/sysdev-u-boot-*: fix command typo

[Michael Opdenacker]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: ebfc6c48ae3ae7c2b87511cb8e8a192c8d92edc2
      https://github.com/bootlin/training-materials/commit/ebfc6c48ae3ae7c2b87511cb8e8a192c8d92edc2
  Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
  Date:   2023-03-06 (Mon, 06 Mar 2023)

  Changed paths:
    M labs/sysdev-u-boot-bbb/sysdev-u-boot-bbb.tex
    M labs/sysdev-u-boot-stm32/sysdev-u-boot-stm32.tex

  Log Message:
  -----------
  labs/sysdev-u-boot-*: fix command typo

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