fix(deps): update dependency org.keycloak:keycloak-admin-client to v26.0.8

Author: renovate[bot]

pom.xml

@@ -19,7 +19,7 @@
         <java.version>25</java.version>
         <spring-cloud.version>2025.0.0</spring-cloud.version>
         <springdoc.version>2.8.13</springdoc.version>
-        <keycloak-admin-client.version>26.0.6</keycloak-admin-client.version>
+        <keycloak-admin-client.version>26.0.8</keycloak-admin-client.version>
         <spotless-maven-plugin.version>3.0.0</spotless-maven-plugin.version>
         <palantir-java-format.version>2.74.0</palantir-java-format.version>
         <dockerImageName>sivaprasadreddy/ft-user-service</dockerImageName>