change maven download url

.mvn/wrapper/maven-wrapper.properties

@@ -1 +1 @@
-distributionUrl=http://mirrors.hust.edu.cn/apache/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.zip
+distributionUrl=https://downloads.apache.org/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.zip