Respect go version from go.mod

From: Nuno Teixeira <eduardo_at_freebsd.org>
Date: Fri, 06 Oct 2023 12:00:42 UTC
Hello all,

Do we need to respect go version from go.mod in USES=go:<version>?

example:
---
module github.com/vmware/govmomi

go 1.19

require (
github.com/a8m/tree v0.0.0-20210115125333-10a5fd5b637d
github.com/dougm/pretty v0.0.0-20171025230240-2ee9d7453c02
<snip>
---

Thanks,

-- 
Nuno Teixeira
FreeBSD Committer (ports)