x/website: anchor link broken in golang website mod.md

[zihengCat]

An anchor link URL broken in website/_content/doc/mod.md line 3038.
Missing the doc: Why does "go get" use HTTPS when cloning a repository?

https://github.com/golang/website/blob/master/_content/doc/mod.md

[cherrymui]

x/website is supposed to be used for the golang.org website. The link is not broken there. https://golang.org/ref/mod#private-module-repo-auth

Closing. Thanks.