docs: update changelog

Author: dsferruzza

CHANGELOG.md

@@ -5,6 +5,7 @@
 - support client roles
 - add common claims that Keycloak provides by default (`iss`, `aud`, `iat`, `jti` and `azp`)
 - change the type of the `sub` claim from `String` to `Uuid`
+- improve debug logs
 
 ## 0.1.0