git: 77a6696abb69..6d46c752afc8 - vendor/libarchive - vendor branch updated

From: Martin Matuska <mm_at_FreeBSD.org>
Date: Thu, 30 Jul 2026 08:10:13 UTC
The branch vendor/libarchive has been updated by mm:

URL: https://cgit.FreeBSD.org/src/log/?id=77a6696abb69..6d46c752afc8

6d46c752afc8 Update vendor/libarchive to 3.8.9