Cannot create quic http/3 connection using URL

@jasnell
@nodejs

NodeJS versions: I did this in v27.0.0-pre, but it happens on any version that supports quic.
I noticed here this block of code, which was used as part of an example for an http/3 client:

const session = await connect('example.com:443', {
  // ALPN defaults to 'h3'.
  servername: 'example.com',
});
await session.opened;

If I try to call quic.connect(), whether I have the intention to use http/3 or raw quic, if I set the address parameter of the function to a URL instead of an IP address, it throws an error. But in the block of code I showed, it just uses 'example.com:443'. This can be a problem because some websites change the IP every few minutes, so then it would be mandatory to perform a DNS lookup.
Thank you

从 doc/api/quic.md 中的最小 HTTP/3 客户端示例开始，复现传递给 quic.connect() 的 IP 地址和 URL 之间的差异。跟踪 connect 入口点及相关测试，以确定是否支持 URL 输入，或者示例是否不正确。如果计划进行代码更改，则需要为报告的输入添加覆盖；当行为与文档一致时即表示完成。