Upgrade to Maven Wrapper 3.9.6.

See #4592

Author: mp911de

Diff for: .mvn/wrapper/maven-wrapper.properties

@@ -1,2 +1,2 @@
-#Wed Oct 04 16:58:02 PDT 2023
-distributionUrl=https\://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.5/apache-maven-3.9.5-bin.zip
+#Thu Dec 14 08:40:36 CET 2023
+distributionUrl=https\://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip