Retrieves a retrospective step

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

{
  "data": {
    "id": "64b28a21-4b0f-41dc-85d3-cd0a275dc912",
    "type": "retrospective_steps",
    "attributes": {
      "retrospective_process_id": "bb718863-2df1-4cc1-ad8b-fd69cab1804b",
      "title": "Step 11",
      "description": "Bar",
      "incident_role_id": "1fff4ce9-d7ea-4010-ad85-28554614c985",
      "due_after_days": null,
      "position": 1,
      "skippable": true,
      "created_at": "2026-01-07T12:01:57.120-08:00",
      "updated_at": "2026-01-07T12:01:57.120-08:00"
    }
  }
}