landlock: Update formatting

landlock: Update formatting

Following commit 99df2a8eba34 ("clang-format: fix formatting of guard()
and scoped_guard() statements"), update scoped_guard() formatting.
Also, see the related fix [1].

Cc: Günther Noack <gnoack@google.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Link: https://lore.kernel.org/r/20260708105713.2073335-1-mic@digikod.net
Link: https://patch.msgid.link/20260708110635.2083515-1-mic@digikod.net
Reviewed-by: Günther Noack <gnoack@google.com>
Signed-off-by: Mickaël Salaün <mic@digikod.net>