[bootlin/training-materials] 62b680: lab-data/embedded-linux-4d: fix typo in file name

[Thomas Petazzoni]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 62b68005591527dbd683d991305c38a11e15f848
      https://github.com/bootlin/training-materials/commit/62b68005591527dbd683d991305c38a11e15f848
  Author: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
  Date:   2022-04-21 (Thu, 21 Apr 2022)

  Changed paths:
    R lab-data/embedded-linux-4d/linux-stm32/stm31mp157_defconfig
    A lab-data/embedded-linux-4d/linux-stm32/stm32mp157_defconfig

  Log Message:
  -----------
  lab-data/embedded-linux-4d: fix typo in file name

stm31 -> stm32

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>