Merge pull request eugenp#11509 from eugenp/lor6-patch-2

Update README.md

Author: lor6

spring-core/README.md

@@ -11,5 +11,6 @@ This module contains articles about core Spring functionality
 - [Spring Application Context Events](https://www.baeldung.com/spring-context-events)
 - [What is a Spring Bean?](https://www.baeldung.com/spring-bean)
 - [Spring PostConstruct and PreDestroy Annotations](https://www.baeldung.com/spring-postconstruct-predestroy)
+- [Intro to the Spring ClassPathXmlApplicationContext](http://www.baeldung.com/spring-classpathxmlapplicationcontext)
 - More articles: [[next -->]](/spring-core-2)