This is an update to the correct OCIO role.
It changes `SceneReference` to `scene_linear`
See https://opencolorio.readthedocs.io/en/latest/guides/authoring/overview.html#config-roles
> - reference - the color space against which the other color spaces are defined
>NOTE: The reference role has sometimes been misinterpreted as being the space in which “reference art” is stored in.
>
> - scene_linear - the scene-referred linear-to-light color space, often the same as the reference space
The current OCIO UX working group doc says:
>reference: This role has had multiple interpreted meanings over the years and is a common point of confusion. It is kept in OCIO for backwards compatibility, but the recommendation is that it is not used by apps.
Reviewed By: jbakker
Differential Revision: https://developer.blender.org/D11398
1949aece21