chore: small doc/data update by @ex1234

Author: ex1234

README.md

@@ -66,3 +66,5 @@ many of the algorithms can be found in the [wiki][explanation].
 <a href = "https://github.com/TheAlgorithms/JavaScript/graphs/contributors">
   <img src = "https://contrib.rocks/image?repo=TheAlgorithms/JavaScript"/>
 </a>
+
+Minor: note about running locally (by @ex1234)