Plugin name and Package name need to be equal (?) #258

I've checked https://docs.lando.dev/guides/updating-plugins-v4.html, and it isn't obvious from here that the name in package.json should be the same as plugin.js|yaml|yml. Not doing so will crash the installation with:

[FAILED] The "paths[3]" argument must be of type string. Received undefined

caused by https://github.com/lando/core/blob/main/utils/fetch-plugin.js#L19

I'm not sure this indented. It it is, it would be great to update the guide to include scopes in the examples, as there's (from my understanding) no way to publish a package (/plugin) without scope.