Updated deprecation msg to reactionary-atom-fork

exports/atom.coffee

@@ -118,7 +118,7 @@ unless process.env.ATOM_SHELL_INTERNAL_RUN_AS_NODE
     require 'react-atom-fork'
 
   Object.defineProperty module.exports, 'Reactionary', get: ->
-    deprecate "Please require `reactionary` instead: `Reactionary = require 'reactionary'`. Add `\"reactionary\": \"^0.9\"` to your package dependencies."
+    deprecate "Please require `reactionary-atom-fork` instead: `Reactionary = require 'reactionary-atom-fork'`. Add `\"reactionary-atom-fork\": \"^0.9\"` to your package dependencies."
     require 'reactionary-atom-fork'
 
 Object.defineProperty module.exports, 'Git', get: ->