Bump org.keycloak:keycloak-services from 22.0.5 to 23.0.3

Bumps [org.keycloak:keycloak-services](https://github.com/keycloak/keycloak) from 22.0.5 to 23.0.3.
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@22.0.5...23.0.3)

---
updated-dependencies:
- dependency-name: org.keycloak:keycloak-services
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -27,7 +27,7 @@
     <java.version>17</java.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <main.java.package>gr.cti.nts</main.java.package>
-    <keycloak.version>22.0.5</keycloak.version>
+    <keycloak.version>23.0.3</keycloak.version>
     <junit.version>4.13.2</junit.version>
     <lombok.version>1.18.30</lombok.version>
     <auto-service.version>1.1.1</auto-service.version>