Bump Maven wrapper to 3.9.16

Update `.mvn/wrapper/maven-wrapper.properties` to use Apache Maven 3.9.16 instead of 3.9.15 via the wrapper distribution URL.

Author: mercyblitz

.mvn/wrapper/maven-wrapper.properties

@@ -1,3 +1,3 @@
 wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.9.15/apache-maven-3.9.15-bin.zip
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip