git: 14feafd16d12..a8fa7ccb4730 - vendor/expat - vendor branch updated

From: Xin LI <delphij_at_FreeBSD.org>
Date: Mon, 29 Sep 2025 04:21:04 UTC
The branch vendor/expat has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=14feafd16d12..a8fa7ccb4730

a8fa7ccb4730 Vendor import of expat 2.7.3.