Switch Maven wrapper to official Maven Central

Update .mvn/wrapper/maven-wrapper.properties to use the official Maven Central distribution URL (https://repo1.maven.org/...) for apache-maven-3.9.15 instead of the Alibaba Cloud mirror. No other wrapper settings (wrapperVersion or distributionType) were changed; this ensures the wrapper fetches the canonical Apache Maven binary.

Author: mercyblitz

.mvn/wrapper/maven-wrapper.properties

@@ -1,3 +1,3 @@
 wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://maven.aliyun.com/repository/public/org/apache/maven/apache-maven/3.9.15/apache-maven-3.9.15-bin.zip
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.9.15/apache-maven-3.9.15-bin.zip