git: 8e6e1224184e..16c0a3151e5f - vendor/nvi - vendor branch updated

From: Baptiste Daroussin <bapt_at_FreeBSD.org>
Date: Wed, 27 Sep 2023 16:01:11 UTC
The branch vendor/nvi has been updated by bapt:

URL: https://cgit.FreeBSD.org/src/log/?id=8e6e1224184e..16c0a3151e5f

16c0a3151e5f nvi: import version 2.2.1