testing/opencolorio: take maintainership, upgrade to 2.1.0
I would like to take maintainership from Mark Riedesel. Similar reasoning to !21969 (merged)
Ref https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.1.0
I would like to take maintainership from Mark Riedesel. Similar reasoning to !21969 (merged)
Ref https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.1.0