Upgrade to Maven Wrapper 3.9.4.

See #1582

Author: sxhinzvc

.mvn/wrapper/maven-wrapper.properties

@@ -1,2 +1,2 @@
-#Mon Jul 03 09:42:14 CEST 2023
-distributionUrl=https\://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.3/apache-maven-3.9.3-bin.zip
+#Mon Aug 14 07:23:20 EDT 2023
+distributionUrl=https\://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.4/apache-maven-3.9.4-bin.zip