update pom to use JDK 24

.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" project-jdk-name="23" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_24" project-jdk-name="24" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

pom.xml

@@ -26,7 +26,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<project.jdk.version>23</project.jdk.version>
+		<project.jdk.version>24</project.jdk.version>
 
 		<!-- Group IDs of jars that need to stay on the class path for now -->
 		<!-- remove them, as soon they got modularized or support is dropped (i.e., WebDAV) -->