如何在Discord.js中编辑嵌入的缩略图？

const Discord = require('discord.js');
const client = new Discord.Client();

client.on('message', message => {
  if (message.content === '!embed') {
    const embed = new Discord.MessageEmbed()
      .setTitle('Embed Title')
      .setDescription('Embed Description')
      .setImage('https://example.com/thumbnail.jpg')
      .setTimestamp()
      .setFooter('Embed Footer');

    message.channel.send(embed);
  }
});

client.login('YOUR_DISCORD_TOKEN');