Add a redirect for the recently created x/website subrepository.
It's not yet included at https://golang.org/pkg/#subrepo because it's
in development. Once development reaches the point that x/website
is the canonical location of the golang.org server, we can consider
including x/website at https://golang.org/pkg/#subrepo (just like
x/blog, x/tour, x/build are already included there).
Updates golang/go#29206
Change-Id: I6889c1f5e40f11abca944b217a7354f76c08c8eb
Reviewed-on: https://go-review.googlesource.com/c/156337
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>