Update RetrospectiveProcessGroup Step

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

{
  "data": {
    "id": "038b5113-acbe-49e7-833d-c1f9fbfbde7f",
    "type": "retrospective_process_group_steps",
    "attributes": {
      "retrospective_process_group_id": "0cfa7a98-cb6c-433e-a7b9-a88ba7d5d285",
      "retrospective_step_id": "80ed303c-7eaf-4aa5-bd8a-1eba2f527c84",
      "position": 2,
      "updated_at": "2025-04-20T05:24:52.588-07:00",
      "created_at": "2025-04-20T05:24:52.435-07:00"
    }
  }
}