Fix #430: correct documentation about forcing off/on wd3 shim mode

Author: teodesian

lib/Selenium/Remote/Driver.pm

@@ -1102,7 +1102,7 @@ Print whether the server (or browser) thinks it's implemented webdriver 3.
 If this returns true, webdriver 3 methods will be used in the case an action exists in L<Selenium::Remote::Spec> for the method you are trying to call.
 If a method you are calling has no webdriver 3 equivalent (or browser extension), the legacy commands implemented in L<Selenium::Remote::Commands> will be used.
 
-Note how I said *thinks* above.  In the case you want to force usage of legacy methods, call set_webdriver_3() to work around various browser issues.
+Note how I said *thinks* above.  In the case you want to force usage of legacy methods, set $driver->{is_wd3} to work around various browser issues.
 
 =cut