[release-branch.go1.12] doc: don't use "go tool vet" as an example
Updates #30199
Change-Id: Ib4586e3facb8c0985c8882482d94843b648b9d2f
Reviewed-on: https://go-review.googlesource.com/c/162257
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
(cherry picked from commit
ffd096db2b1cff6399eb1f86e5652564ee8ee362)
Reviewed-on: https://go-review.googlesource.com/c/162238
Reviewed-by: Andrew Bonventre <andybons@golang.org>