curl --request PUT \
  --url https://api.example.com/api/functions/{slug} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "code": "<string>",
  "description": "<string>"
}
'

{
  "success": true,
  "function": {
    "id": "123e4567-e89b-12d3-a456-426614174000",
    "slug": "hello-world",
    "name": "Hello World Function v2",
    "description": "Returns a greeting message",
    "status": "active",
    "updated_at": "2024-01-21T11:00:00Z"
  }
}