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": "46b807e0-b596-4c70-8b3b-dbee7e160345",
    "type": "retrospective_process_groups",
    "attributes": {
      "retrospective_process_id": "a3f87fe5-6583-49a0-b591-ddfbb2bcb7d8",
      "sub_status_id": "6e27beb1-c052-4c21-9b5a-729d08282478",
      "position": 1,
      "updated_at": "2025-12-01T14:21:39.668-08:00",
      "created_at": "2025-12-01T14:21:39.668-08:00"
    },
    "relationships": {
      "retrospective_process_group_steps": {
        "data": []
      }
    }
  }
}