review: Fix typo in help text

Change-Id: Ia60603f2659b87f0c4194849002fca7181cc4004
Reviewed-on: https://go-review.googlesource.com/1190
Reviewed-by: Andrew Gerrand <adg@golang.org>
1 file changed
tree: dc1a4d8acba057496f88a772e8acb33b22723441
  1. README
  2. git-review/