MinimumRequirements.md: add the version requirements for Git For golang/go#77284 Change-Id: Ie8ecb34c8286b43115e7cdddd74242a8f9a30bf0 Reviewed-on: https://go-review.googlesource.com/c/wiki/+/757580 Reviewed-by: Michael Matloob <matloob@golang.org>