fix surefire source git repo url
diff --git a/maven-surefire-plugin/src/site/apt/developing.apt.vm b/maven-surefire-plugin/src/site/apt/developing.apt.vm
index 7299b9a..dcae1d7 100644
--- a/maven-surefire-plugin/src/site/apt/developing.apt.vm
+++ b/maven-surefire-plugin/src/site/apt/developing.apt.vm
@@ -36,7 +36,7 @@
the complete module and build from there:
+---+
- git clone https://git-wip-us.apache.org/repos/asf/maven-surefire.git
+ git clone https://gitbox.apache.org/repos/asf/maven-surefire.git
+---+
* Making Test Cases for Demonstrating Problems