git: a8dfdb79eb00..808527f2972c - vendor/libarchive - vendor branch updated

From: Martin Matuska <mm_at_FreeBSD.org>
Date: Sat, 31 Oct 2026 23:10:25 UTC
The branch vendor/libarchive has been updated by mm:

URL: https://cgit.FreeBSD.org/src/log/?id=a8dfdb79eb00..808527f2972c

808527f2972c Update vendor/libarchive to 3.8.11