cmd/dist: fix tipo in comment
cmd/dist: fix tipo in comment

Change-Id: I98fbf0dc94cf182adec5d414a56b9cc5126c38f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/249437
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Reviewed-by: Cherry Zhang <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/go,cloudflare/go,golang/go,golang/go,nawawi/go,cloudflare/go,CAFxX/go,cloudflare/go,golang/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,CAFxX/go,cloudflare/go,golang/go,nawawi/go,nawawi/go,CAFxX/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,cloudflare/go,CAFxX/go,nawawi/go,CAFxX/go,golang/go,nawawi/go,nawawi/go,CAFxX/go