Revrite npmjs.com URLs in package readmes

[nicolo-ribaudo]

The readme of this package: https://npmx.dev/package/zip-stream has a "archiver" link that points to https://www.npmjs.com/package/archiver. It'd be great if npmx detected it and rewrote it to https://npmx.dev/package/archiver instead.

[mikouaji]

This was added and working, so we either have a regression or a different case for link in this readme