message: imgproc: update cornerSubPix documentation
diff: @@ -1861,7 +1861,7 @@ gradient term \f$G\f$ and the second gradient term \f$b\f$ gives:
  The algorithm sets the center of the neighborhood window at this new center \f$q\f$ and then iterates
  until the center stays within a set threshold.
  -@param image Input image.
  +@param image Input single-channel, 8-bit or float image.
  @param corners Initial coordinates of the input corners and refined coordinates provided for
  output.
  @param winSize Half of the side length of the search window. For example, if winSize=Size(5,5) ,
  