Update dependency org.keycloak:keycloak-server-spi-private to v26

Author: renovate[bot]

Diff for: ol-keycloak/ol-spi/pom.xml

@@ -29,7 +29,7 @@
         <dependency>
             <groupId>org.keycloak</groupId>
             <artifactId>keycloak-server-spi-private</artifactId>
-            <version>25.0.6</version>
+            <version>26.0.6</version>
         </dependency>
     </dependencies>