twister: Add missing spaces

This adds some missing whitespaces, thus improves the output of `twister
--help`.

Signed-off-by: Reto Schneider <reto.schneider@husqvarnagroup.com>
This commit is contained in:
Reto Schneider 2025-03-24 14:24:03 +01:00 committed by Benjamin Cabé
commit 67834a84c9