suggest cloning rbenv via https instead of git://

README.md

@@ -156,7 +156,7 @@ easy to fork and contribute any changes back upstream.
 1. Check out rbenv into `~/.rbenv`.
 
     ~~~ sh
-    $ git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
+    $ git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
     ~~~
 
 2. Add `~/.rbenv/bin` to your `$PATH` for access to the `rbenv`