Fix subsurface_color range to indicate 3-dimensionality

Signed-off-by: MAP <74914349+MAP233224@users.noreply.github.com>

Author: MAP233224

parametrization.md.html

@@ -42,7 +42,7 @@
 | `transmission_dispersion_abbe_number` | Abbe number         | `float`   | $ (0, \infty)   $ | $ [9, 91]   $ | $ 20               $ |                  |
 | **Subsurface**                                                                                                                                        |
 | `subsurface_weight`                   | Weight              | `float`   | $ [0, 1]        $ |               | $ 0                $ |                  |
-| `subsurface_color`                    | Color               | `color3`  | $ [0, 1]        $ |               | $ (0.8, 0.8, 0.8)  $ |                  |
+| `subsurface_color`                    | Color               | `color3`  | $ [0, 1]^3      $ |               | $ (0.8, 0.8, 0.8)  $ |                  |
 | `subsurface_radius`                   | Radius              | `float`   | $ [0, \infty)   $ | $ [0, 1]    $ | $ 1                $ | length           |
 | `subsurface_radius_scale`             | Radius scale        | `color3`  | $ [0, 1]^3      $ |               | $ (1.0, 0.5, 0.25) $ |                  |
 | `subsurface_scatter_anisotropy`       | Anisotropy          | `float`   | $ [-1, 1]       $ |               | $ 0                $ |                  |