Bumps Wicket 10.8.0 -> 10.9.0

see https://wicket.apache.org/news/2026/05/05/wicket-10.9.0-released.html

Author: andi-huber

bom/pom.xml

@@ -156,7 +156,7 @@ identified
         module-path for testing, that is, put everything on the class-path -->
         <swagger-core.version>2.2.49</swagger-core.version>
 
-        <wicket.version>10.8.0</wicket.version>
+        <wicket.version>10.9.0</wicket.version>
         <wicket-bootstrap.version>7.0.14</wicket-bootstrap.version> <!--
         de.agilecoders.wicket:wicket-bootstrap... -->
         <wicket-webjars.version>4.0.14</wicket-webjars.version> <!--