git: 5a7f1dde93a4..682da5a0fdb2 - vendor/bc - vendor branch updated

From: Stefan Eßer <se_at_FreeBSD.org>
Date: Thu, 11 Sep 2025 14:10:08 UTC
The branch vendor/bc has been updated by se:

URL: https://cgit.FreeBSD.org/src/log/?id=5a7f1dde93a4..682da5a0fdb2

682da5a0fdb2 vendor/bc: upgrade to version 7.1.0