Update README.md

Author: daoire

spring-5-security/README.md

@@ -4,4 +4,4 @@
 - [Extra Login Fields with Spring Security](http://www.baeldung.com/spring-security-extra-login-fields)
 - [A Custom Spring SecurityConfigurer](http://www.baeldung.com/spring-security-custom-configurer)
 - [New Password Storage In Spring Security 5](http://www.baeldung.com/spring-security-5-password-storage)
-
+- [Default Password Encoder in Spring Security 5](https://www.baeldung.com/spring-security-5-default-password-encoder)