Fix typo

Author: chadlwilson

README.md

@@ -7,7 +7,7 @@ JRuby-Rack supports Rails as well as any Rack-compatible Ruby web framework.
 For more information on Rack, visit http://rack.github.io/.
 
 **This README (master) targets JRuby-Rack 1.3. Please use the [1.2-stable](https://github.com/jruby/jruby-rack/tree/1.2-stable) or 
-[1.1-stable](https://github.com/jruby/jruby-rack/tree/1.1-stable) branchee for
+[1.1-stable](https://github.com/jruby/jruby-rack/tree/1.1-stable) branches for
 current stable releases.**
 
 [![Gem Version](https://badge.fury.io/rb/jruby-rack.png)][8]