Fix mvn signature, use sha256sum

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

Author: holgerfriedrich

.mvn/wrapper/maven-wrapper.properties

@@ -17,4 +17,4 @@
 wrapperVersion=3.3.2
 distributionType=only-script
 distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.13/apache-maven-3.9.13-bin.zip
-distributionSha512Sum=43f82fc40a65079528c0037856c95b8aa04bd74c9851b01225c61c5debeb5e3b7d2acd1266979b4ea359887dfc26f176932b5f10eb47d684add97d262a821592
+distributionSha256Sum=d2a998d737a75a6f6dc4f51e37c28921819f23586b9a6e9fd062409836de58b6