fix warning

Author: AleksandrPanov

modules/wechat_qrcode/include/opencv2/wechat_qrcode.hpp

@@ -56,6 +56,7 @@ class CV_EXPORTS_W WeChatQRCode {
      * @param detector_caffe_model_path caffe model file path for the detector
      * @param super_resolution_prototxt_path prototxt file path for the super resolution model
      * @param super_resolution_caffe_model_path caffe file path for the super resolution model
+     * @param detectorParametersDL detector settings
      */
     CV_WRAP WeChatQRCode(const std::string& detector_prototxt_path = "",
                          const std::string& detector_caffe_model_path = "",