backlink added

Author: collaboratewithakash

core-kotlin-modules/core-kotlin-9/README.md

@@ -6,3 +6,4 @@
 - [Generate an MD5 Hash in Kotlin](https://www.baeldung.com/kotlin/md5-hash)
 - [Is Kotlin Pass-By-Value or Pass-By-Reference?](https://www.baeldung.com/kotlin/parameters-pass-value-reference)
 - [Util Classes in Kotlin](https://www.baeldung.com/kotlin/utility-class)
+- [Result Class in Kotlin](https://www.baeldung.com/kotlin/result-class)