git: 7699e1386a16..401770e05c71 - vendor/unbound - vendor branch updated

From: Cy Schubert <cy_at_FreeBSD.org>
Date: Mon, 18 Sep 2023 20:02:10 UTC
The branch vendor/unbound has been updated by cy:

URL: https://cgit.FreeBSD.org/src/log/?id=7699e1386a16..401770e05c71

401770e05c71 unbound: Vendor import 1.18.0