Bump wicket-core from 8.9.0 to 8.12.0

Bumps wicket-core from 8.9.0 to 8.12.0.

---
updated-dependencies:
- dependency-name: org.apache.wicket:wicket-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -32,7 +32,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <wicket.version>8.9.0</wicket.version>
+        <wicket.version>8.12.0</wicket.version>
     </properties>   
 
     <build>