[releng] Fix maven wrapper

Using dlcdn.apache.org as URL wasn't a good idea; it carries only the
latest 3.8.x and 3.9.x versions. repo.maven.apache.org keeps all
versions, so use that.

Author: tomaswolf

.mvn/wrapper/maven-wrapper.properties

@@ -1,3 +1,3 @@
 wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://dlcdn.apache.org/maven/maven-3/3.9.12/binaries/apache-maven-3.9.12-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.12/apache-maven-3.9.12-bin.zip