Docs: Clarify Linter vs ESLint in node.js api docs (fixes #14953) (#14995)
Docs: Clarify Linter vs ESLint in node.js api docs (fixes #14953) (#14995)

* Improve clarity on the usage of the Linter class

* Fix MD issue

* Add line break for readability

* Update docs/developer-guide/nodejs-api.md

Co-authored-by: Nicholas C. Zakas <3b9de09f2ff76afe9f0ad4fcae4ff68f52ec7fc4@humanwhocodes.com>
Trott/eslint,platinumazure/eslint,DavidAnson/eslint,platinumazure/eslint,eslint/eslint,DavidAnson/eslint,Trott/eslint,eslint/eslint