git: 20de55b07cf9..393b94eb9f51 - vendor/mandoc - vendor branch updated

[Alexander Ziaee]

The branch vendor/mandoc has been updated by ziaee:

URL: https://cgit.FreeBSD.org/src/log/?id=20de55b07cf9..393b94eb9f51

393b94eb9f51 Vendor import of mandoc at 2025-04-08