Update materials in the simulation setup

Example request

{
  "operations": [
    {
      "reference": {
        "materialGroupId": "internal:ef304761-dbde-495e-9891-9ee85e809cd5",
        "materialId": "internal:69bb2bf0-6743-4bf8-b926-c0e447eeeeee"
      }
    }
  ]
}