curl --request PATCH \
  --url https://api.shoppex.io/dev/v1/products/{id}/variants/fields/{fieldId}/options/{optionId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "label": "Europe Updated"
}
'

{
  "data": {
    "id": "option_1",
    "label": "Europe Updated",
    "value": "eu",
    "sort_order": 2,
    "created_at": 1711953600,
    "updated_at": 1711953900
  }
}