setChatDescription(chatId, description, form = {}) {
    form.chat_id = chatId;
    form.description = description;
    return this._request('setChatDescription', { form });
  }
Use this method to change the description of a group, a supergroup or a channel.

The bot **must be an administrator in the chat** for this to work and must have the appropriate admin rights.

@param {Number|String} chatId  Unique identifier for the target chat or username of the target channel (in the format `@channelusername`)
@param {String} description New chat title, 0-255 characters
@param {Object} [options] Additional Telegram query options
@return {Promise} True on success
@see https://core.telegram.org/bots/api#setchatdescription