Retrieves a Retrospective Template

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

{
  "data": {
    "id": "4ad9ca31-c593-428a-9f48-3953a2976c5f",
    "type": "post_mortem_templates",
    "attributes": {
      "name": "Eius excepturi dolorum officia.",
      "slug": "eius-excepturi-dolorum-officia",
      "format": "html",
      "default": false,
      "content": "",
      "created_at": "2025-10-03T19:39:43.679-07:00",
      "updated_at": "2025-10-03T19:39:43.693-07:00"
    }
  }
}