def update!
      client.put("/webhooks/#{id}", {
        description: description,
        idModel: id_model,
        callbackURL: callback_url,
        active: active
      })
    end
def update!
      client.put("/webhooks/#{id}", {
        description: description,
        idModel: id_model,
        callbackURL: callback_url,
        active: active
      })
    end
Update the webhook.

 @raise  [Trello::Error] if the Webhook could not be saved.

 @return [String] the JSON representation of the updated webhook.