Updated README.md

added link back to the article: https://www.baeldung.com/java-list-vs-arraylist

Author: Asjad-J

core-java-modules/core-java-collections-list-3/README.md

@@ -11,4 +11,5 @@ This module contains articles about the Java List collection
 - [Filtering a Java Collection by a List](https://www.baeldung.com/java-filter-collection-by-list)
 - [How to Count Duplicate Elements in Arraylist](https://www.baeldung.com/java-count-duplicate-elements-arraylist)
 - [Finding the Differences Between Two Lists in Java](https://www.baeldung.com/java-lists-difference)
+- [List vs. ArrayList in Java](https://www.baeldung.com/java-list-vs-arraylist)
 - [[<-- Prev]](/core-java-modules/core-java-collections-list-2)