[rb] update example with correct syntax
@@ -75,7 +75,7 @@ module Selenium
#
# WebDriver.for :firefox, profile: 'some-profile'
# WebDriver.for :firefox, profile: Profile.new
- # WebDriver.for :remote, url: "http://localhost:4444/wd/hub", desired_capabilities: caps
+ # WebDriver.for :remote, url: "http://localhost:4444/wd/hub", capabilities: caps
#
# One special argument is not passed on to the bridges, :listener.
# You can pass a listener for this option to get notified of WebDriver events.
