Retrieves a RetrospectiveProcessGroup Step

curl --request GET \
  --url https://api.rootly.com/v1/retrospective_process_group_steps/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "120b05b9-19ed-42ad-9411-811d1e7b4572",
    "type": "retrospective_process_group_steps",
    "attributes": {
      "retrospective_process_group_id": "50a567c1-f216-4525-9341-9644c42b3193",
      "retrospective_step_id": "427dfa96-f4f1-4327-b97f-00feb7f06c6e",
      "position": 1,
      "updated_at": "2025-09-18T09:21:24.143-07:00",
      "created_at": "2025-09-18T09:21:24.143-07:00"
    }
  }
}