Use `lintian --print-version` instead of `lintian --version` to determine the lintian version

Noted at https://salsa.debian.org/freexian-team/debusine/-/blame/devel/debusine/tasks/lintian.py?ref_type=heads#L590

The lintian tool has a --print-version parameter that only prints the version, so you do not need a regex to extract it afterwards.