design: disambiguate offical spaces in CoC by linking to them
design: disambiguate offical spaces in CoC by linking to them

Update golang/go#13073

Change-Id: I229140cc205c55bf2028e209c3795b617852eb54
Reviewed-on: https://go-review.googlesource.com/17025
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

golang/proposal,golang/proposal