Update a Retrospective Process Group

curl --request PUT \
  --url https://api.rootly.com/v1/retrospective_process_groups/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "retrospective_process_groups",
    "attributes": {
      "sub_status_id": "<string>",
      "position": 123
    }
  }
}'

{
  "data": {
    "id": "1b9f508e-9a7b-433e-959d-dd689913c32a",
    "type": "retrospective_process_groups",
    "attributes": {
      "retrospective_process_id": "3d73b54d-4b50-4e64-b416-393097fd7965",
      "sub_status_id": "f39167f3-52ad-4240-a7b5-baae14889405",
      "position": 1,
      "updated_at": "2025-09-16T17:17:08.167-07:00",
      "created_at": "2025-09-16T17:17:08.167-07:00"
    },
    "relationships": {
      "retrospective_process_group_steps": {
        "data": []
      }
    }
  }
}