Update Maven wrapper to 3.9.16 (#326)

Signed-off-by: spring-builds <spring-builds@users.noreply.github.com>
Co-authored-by: spring-builds <spring-builds@users.noreply.github.com>

Author: spring-builds

.mvn/wrapper/MavenWrapperDownloader.java

@@ -1,2 +1,4 @@
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar
+wrapperVersion=3.3.4
+distributionType=bin
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.16/apache-maven-3.9.16-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.3.4/maven-wrapper-3.3.4.jar