- Docs: Release building (alternative for `build.js`)

docs/ReleaseInstructions.md

@@ -36,7 +36,8 @@ The above steps can be done on a fork and committed via a pull request.
 
 1. Ensure you are on the `master` branch with `git checkout master`.
 1. Switch to the `gh-pages` branch with `git checkout gh-pages`.
-1. Run the `build.js` executable
+1. Run the `build.js` executable (`npm run build` if within the project root
+    directory).
 1. Commit these changes with `git commit -m "Updating files for release X.Y.Z"`.
 1. Switch back to the `master` branch with `git checkout master`.
 1. Ensure this step worked by visiting