url: fix url.format with ipv6 hostname

Fixes: https://github.com/nodejs/node/issues/36654

PR-URL: https://github.com/nodejs/node/pull/36665


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Yash Ladha <yash@yashladha.in>