Merge pull request #7 from lsylvester/update-reame-sample-code-syntax-error

Up[date README sample code so there is no syntax error

README.md

@@ -52,7 +52,7 @@ module ApplicationCable
 
     protected
       def find_verified_user
-        if current_user = User.find cookies.signed[:user_id]
+        if current_user = User.find(cookies.signed[:user_id])
           current_user
         else
           reject_unauthorized_connection