Update npm mirror url in the documentation

[michaelhidalgo]

Hey folks.

The documentation here https://docs.npmjs.com/cli/v9/using-npm/registry states that the mirror url is https://skimdb.npmjs.com/registry. however, as per https://github.com/npm/registry/blob/master/docs/REPLICATE-API.md#overview, it states that skimdb is deprecated in favor of https://replicate.npmjs.com.

Can you guys please confirm which mirror is the accurate and update the documentation here

Thanks.