README.md: correct installation instructions

Fixes golang/go#28196

Change-Id: I5fa57b039798c172a0b2610d8278077aca15512e
Reviewed-on: https://go-review.googlesource.com/c/141802
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/README.md b/README.md
index 48a3e08..8588768 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,9 @@
 
 ## Download/Install
 
-The easiest way to install is to run `go get -u golang.org/x/review`. You can
+The easiest way to install is to run `go get -u golang.org/x/review/git-codereview`. You can
 also manually git clone the repository to `$GOPATH/src/golang.org/x/review`.
 
-The review binary itself is available at `golang.org/x/review/git-codereview`.
 Run `git codereview hooks` to install Gerrit hooks for your git repository.
 
 ## Report Issues / Send Patches