build(deps): bump keycloak-core from 17.0.0 to 20.0.3

Bumps [keycloak-core](https://github.com/keycloak/keycloak) from 17.0.0 to 20.0.3.
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](https://github.com/keycloak/keycloak/compare/17.0.0...20.0.3)

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

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

pom.xml

@@ -11,7 +11,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <version.keycloak>17.0.0</version.keycloak>
+        <version.keycloak>20.0.3</version.keycloak>
     </properties>
 
     <dependencies>