Retrieves a FormFieldPosition

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

{
  "data": {
    "id": "1c66f664-ea75-4512-96cf-5fe3a1698cb8",
    "type": "form_field_positions",
    "attributes": {
      "form_field_id": "0f07c84d-487d-4c50-90b0-fa7c231b9322",
      "form": "web_update_incident_form",
      "position": 1
    }
  }
}