doc: add lint-js-fix into BUILDING.md

When there is any auto-fixable linting errors, there is not a way to
pass `--fix` into `make lint-js` as far as I am aware of. Spent quiet
some time fixing them one by one and just realised `lint-js-fix` exists.

PR-URL: #52290
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>

Author: jakecastelli

BUILDING.md

@@ -327,6 +327,8 @@ documentation tests.
 To run the linter without running tests, use
 `make lint`/`vcbuild lint`. It will lint JavaScript, C++, and Markdown files.
 
+To fix auto fixable JavaScript linting errors, use `make lint-js-fix`.
+
 If you are updating tests and want to run tests in a single test file
 (e.g. `test/parallel/test-stream2-transform.js`):