fix get_int_login_free_user_id annotation issue

lib/dingtalk/auth.rb

@@ -8,7 +8,7 @@ module Dingtalk
 
     # 企业内部应用免登录 用户ID获取
     # {https://ding-doc.dingtalk.com/doc#/serverapi2/clotub}
-    # @!method get_int_login_free_user_id(:code, :access_token)
+    # @!method get_int_login_free_user_id(code:, access_token:)
     # @return [Hash]
     add_request :get_int_login_free_user_id, :get, Dingtalk::RequestUrl::INT_LOGIN_FREE_GET_USER_INFO do |request|
       request.add_arg :code, required: true, in: :query