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": "5485c25b-a879-41b9-911f-11b74b362bdc",
    "type": "retrospective_process_groups",
    "attributes": {
      "retrospective_process_id": "ca13907a-d9ff-4975-bca3-3bbd4b5e6856",
      "sub_status_id": "921e72a3-3183-4d75-813b-1baee306e122",
      "position": 1,
      "updated_at": "2025-08-21T23:46:59.675-07:00",
      "created_at": "2025-08-21T23:46:59.675-07:00"
    },
    "relationships": {
      "retrospective_process_group_steps": {
        "data": []
      }
    }
  }
}