git: cd59570c180e..b17ccc1f4591 - vendor/tzcode - vendor branch updated

From: Dag-Erling Smørgrav <des_at_FreeBSD.org>
Date: Fri, 24 Apr 2026 20:08:37 UTC
The branch vendor/tzcode has been updated by des:

URL: https://cgit.FreeBSD.org/src/log/?id=cd59570c180e..b17ccc1f4591

b17ccc1f4591 Import tzcode 2026b