Update README.md

Author: lor6

core-kotlin-modules/core-kotlin-advanced-3/README.md

@@ -1,10 +1,11 @@
-### Relevant Articles:
+## Relevant Articles:
 - [Passing a Class to a Function in Kotlin](https://www.baeldung.com/kotlin/class-function-parameter)
 - [HTML Builder in Kotlin](https://www.baeldung.com/kotlin/html-generation)
 - [Passing a Type to Generic Method in Kotlin](https://www.baeldung.com/kotlin/generic-methods)
 - [Getting a Kotlin KClass from a Package Class Name String](https://www.baeldung.com/kotlin/kclass-fqn-string)
 - [A Guide to Kotlin Context Receivers](https://www.baeldung.com/kotlin/context-receivers)
 - [Serialize/Deserialize Kotlin Sealed Class](https://www.baeldung.com/kotlin/sealed-class-serialization)
 - [A Guide to Kotlin’s Any, Unit, Nothing](https://www.baeldung.com/kotlin/any-unit-nothing-tutorial)
+- [Resolving Warning: Return can be lifted out of 'when' in Kotlin](https://www.baeldung.com/kotlin/when-lift-return-warning)
 
 - More articles: [[<-- prev]](../core-kotlin-advanced-2)