update readme bootstrap instructions

README.md

@@ -123,11 +123,7 @@ https://s3.amazonaws.com/rebar3/rebar3
 ```sh
 $ git clone https://github.com/rebar/rebar3
 $ cd rebar3
-$ ./bootstrap/bootstrap
-==> rebar (compile)
-Congratulations! You now have a self-contained script called "rebar3" in
-your current working directory. Place this script anywhere in your path
-and you can use rebar to build OTP-compliant apps.
+$ ./bootstrap
 ```