zephyr: Kconfig: fix wrong helptext indentation
zephyr: Kconfig: fix wrong helptext indentation

Fix wrong indentation of PLATFORM_EC_KEYBOARD_CUSTOMIZATION helptext.

BRANCH=none
BUG=none
TEST=cq dry run

Signed-off-by: Fabio Baltieri <1c55e39c05d9ab42261288cf330256b2af6ba179@google.com>
Change-Id: I3021373f917e85c5d06a2b4d1bb28d65f64d5fce
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4021955
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>
Code-Coverage: Zoss <345cf107e82c70959d46f59d98bddc98ce458aff@prod.google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec