message: Update API documentation to mention SetCaptureFileComments
diff: @@ -438,3 +438,10 @@ The path follows the template set in :cpp:func:`SetCaptureFilePathTemplate` so i
  Each capture will be taken independently and saved to a separate file, with no reference to the other frames.
  :param uint32_t numFrames: the number of frames to capture, as an unsigned integer.
  +
  +.. cpp:function:: void SetCaptureFileComments(const char *filePath, const char *comments)
  +
  + This function adds an arbitrary comments field to an existing capture on disk, which will then be displayed in the UI to anyone opening the capture.
  +
  + :param const char* filePath: specifies the path to the capture file to set comments in, as UTF-8 null-terminated string. If this path is ``NULL`` or an empty string, the most recent capture file that has been created will be used.
  + :param const char* comments: specifies the comments to set in the capture file, as UTF-8 null-terminated string.
  