BAEL-2368

update readme

Author: echeyne

java-collections-conversions/README.md

@@ -8,4 +8,5 @@
 - [Converting between a List and a Set in Java](http://www.baeldung.com/convert-list-to-set-and-set-to-list)
 - [Convert a Map to an Array, List or Set in Java](http://www.baeldung.com/convert-map-values-to-array-list-set)
 - [Converting a List to String in Java](http://www.baeldung.com/java-list-to-string)
-- [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)
+- [How to Convert List to Map in Java](http://www.baeldung.com/java-list-to-map)
+- [Array to String Conversions](https://www.baeldung.com/java-array-to-string)