chore(ldap): keep 16/edge lock versions for untouched dependencies

The re-lock silently downgraded packages relative to 16/edge: the
repo's solver policy (min-release-age = 1 day) excludes the releases
that recent lock maintenance picked while they are still inside their
freshness window. This restores the base lock and changes only the
library entry to the pinned commit, so the diff carries no dependency
churn.

Signed-off-by: Marcelo Henrique Neppel <marcelo.neppel@canonical.com>

Author: marceloneppel