git: e188971328b0..b37eb25116f9 - vendor/zlib - vendor branch updated

From: Xin LI <delphij_at_FreeBSD.org>
Date: Sat, 19 Aug 2023 21:56:22 UTC
The branch vendor/zlib has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=e188971328b0..b37eb25116f9

b37eb25116f9 Vendor import of zlib 1.3.