git: ca6c9caa17b3..42df52d15694 - vendor/xz - vendor branch updated

From: Xin LI <delphij_at_FreeBSD.org>
Date: Thu, 03 Aug 2023 07:43:16 UTC
The branch vendor/xz has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=ca6c9caa17b3..42df52d15694

42df52d15694 Vendor import of xz 5.4.4 (trimmed)