Update README.md

Author: rcalago

kotlin-testing-2/README.md

@@ -5,3 +5,4 @@ This module contains articles about testing in Kotlin
 ### Relevant articles:
 - [Mock Static Java Methods Using Mockk](https://www.baeldung.com/kotlin/mockk-mock-static-methods)
 - [Mockk – Check If a Method Was Not Invoked](https://www.baeldung.com/kotlin/mockk-check-method-invoked)
+- [Matching Varargs Using MockK in Kotlin](https://www.baeldung.com/kotlin/mockk-matching-varargs)