Retrieves a Retrospective Template

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

{
  "data": {
    "id": "266bf636-ab15-4b03-97e7-b15e15f6c4dd",
    "type": "post_mortem_templates",
    "attributes": {
      "name": "Culpa eos eveniet consequatur.",
      "slug": "culpa-eos-eveniet-consequatur",
      "format": "html",
      "default": false,
      "content": "",
      "content_html": null,
      "content_json": null,
      "created_at": "2026-01-22T19:23:59.348-08:00",
      "updated_at": "2026-01-22T19:23:59.354-08:00"
    }
  }
}