[bootlin/training-materials] 22c4a2: kernel: modify kernel framework slide title

[Clément Léger]

  Branch: refs/heads/master
  Home:   https://github.com/bootlin/training-materials
  Commit: 22c4a25c05706b0a284be6b0e79e3161ba308f0f
      https://github.com/bootlin/training-materials/commit/22c4a25c05706b0a284be6b0e79e3161ba308f0f
  Author: Clément Léger <clement.leger at bootlin.com>
  Date:   2022-04-29 (Fri, 29 Apr 2022)

  Changed paths:
    M slides/kernel-frameworks2/kernel-frameworks2.tex

  Log Message:
  -----------
  kernel: modify kernel framework slide title

Suggest that this slide is only refering to some kernel frameworks since
a trainee asked me if this was representing all the kernel frameworks.

Signed-off-by: Clément Léger <clement.leger at bootlin.com>