SIVA-968 Update tomcat version

Author: ronpehka

pom.xml

@@ -148,6 +148,7 @@
         <!-- Override vulnerable dependencies that are pulled in via Spring boot -->
         <!-- TODO: Amend this list when Spring Boot version is updated! -->
         <commons-lang3.version>3.20.0</commons-lang3.version> <!-- CVE-2025-48924 -->
+        <tomcat.version>11.0.18</tomcat.version> <!-- CVE-2026-24734 -->
     </properties>
 
     <reporting>