git: c2c85f88902d..5a7f1dde93a4 - vendor/bc - vendor branch updated

From: Stefan Eßer <se_at_FreeBSD.org>
Date: Tue, 24 Sep 2024 21:26:07 UTC
The branch vendor/bc has been updated by se:

URL: https://cgit.FreeBSD.org/src/log/?id=c2c85f88902d..5a7f1dde93a4

5a7f1dde93a4 vendor/bc: upgrade to version 7.0.3