The getgo tool was using the golang.org version as the latest
version to fetch. But this is not always the latest version.
We now use https://golang.org/dl/?mode=json which is the
official latest version.
Fixesgolang/go#42676
Change-Id: I1cd90bfba12b19759599e89b7b4a095700999c09
Reviewed-on: https://go-review.googlesource.com/c/tools/+/270878
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Alexander Rakoczy <alex@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>