Update README.md

Author: Maiklins

core-kotlin-modules/core-kotlin-collections-6/README.md

@@ -2,3 +2,4 @@
 - [Convert a Collection Into an ArrayList in Kotlin](https://www.baeldung.com/kotlin/collection-arraylist-conversion)
 - [Iterate a Collection Referencing Previous Element in Kotlin](https://www.baeldung.com/kotlin/collection-previous-element)
 - [Sorting List with String Dates in Kotlin](https://www.baeldung.com/kotlin/sort-list-string-dates)
+- [Difference Between eachCount() and eachCountTo() Methods in Kotlin](https://www.baeldung.com/kotlin//eachcount-eachcountto)