Retrieves a retrospective step

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

{
  "data": {
    "id": "<string>",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "<string>",
      "title": "<string>",
      "created_at": "<string>",
      "updated_at": "<string>",
      "slug": "<string>",
      "description": "<string>",
      "incident_role_id": "<string>",
      "due_after_days": 123,
      "position": 123,
      "skippable": true
    }
  }
}