fix(deps): update keycloak.version to v26.5.4

Author: renovate[bot]

pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <revision>0.0.0-SNAPSHOT</revision>
         <java.version>21</java.version>
-        <keycloak.version>26.5.3</keycloak.version>
+        <keycloak.version>26.5.4</keycloak.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>