message: Update documentation of camera stereoMode
diff: @@ -2154,10 +2154,16 @@ supports the special parameters listed in the table below.
  bool architectural vertical edges are projected to be
  parallel
  - int stereoMode 0: no stereo (default),
  - 1: left eye,
  - 2: right eye,
  - 3: side-by-side
  + int stereoMode `OSPStereoMode` for stereo rendering,
  + possible values are:
  +
  + `OSP_STEREO_NONE` (default)
  +
  + `OSP_STEREO_LEFT`
  +
  + `OSP_STEREO_RIGHT`
  +
  + `OSP_STEREO_SIDE_BY_SIDE`
  float interpupillaryDistance distance between left and right eye when
  stereo is enabled
  