chore(deps): update dependency org.slf4j:slf4j-simple to v2.0.16

Author: renovate[bot]

keycloak-plugins/pom.xml

@@ -184,7 +184,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
-            <version>2.0.6</version>
+            <version>2.0.16</version>
             <scope>test</scope>
         </dependency>