Update README.md

Author: rcalago

spring-boot-kotlin/README.md

@@ -7,3 +7,4 @@ This module contains articles about Kotlin in Spring Boot projects.
 - [Spring Boot and Kotlin](https://www.baeldung.com/kotlin/spring-boot-kotlin)
 - [Error Handling for REST with Spring in Kotlin](https://www.baeldung.com/kotlin/spring-rest-error-handling)
 - [Spring Integration With Kotlin](https://www.baeldung.com/kotlin/spring-integration)
+- [Kotlin and Spring Boot: Injecting Configuration Properties Using @Value](https://www.baeldung.com/kotlin/spring-boot-inject-properties-value)