build: maven wrapper 升级至 Maven 4.0.0-rc-6（对齐 ddd4j 3.0.x 配置）

Author: loong10k

.mvn/jvm.config

@@ -0,0 +1 @@
+-Xmx1024m

.mvn/wrapper/maven-wrapper.jar

@@ -1 +1,3 @@
-distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.0/apache-maven-3.5.0-bin.zip
+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/4.0.0-rc-6/apache-maven-4.0.0-rc-6-bin.zip