main.star: pin golangbuild to version with working command wrapping

As a temporary mitigation for breakage on Windows, pin golangbuild
to a previously working version from 6 days ago:

https://chrome-infra-packages.appspot.com/p/infra/experimental/golangbuild/windows-amd64/+/ado1WRaYZcQUWIK3JLxq-bnoBu3RUQYmnYyAYo3kjfEC

For golang/go#68310.

Change-Id: Iaea2bbec618a85cfec57deba2c761ef4e79a18f9
Reviewed-on: https://go-review.googlesource.com/c/build/+/596815
TryBot-Bypass: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Than McIntosh <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: dmitshur