Update README for the change in SCM
diff --git a/README.md b/README.md
index d78c443..ae0daf8 100644
--- a/README.md
+++ b/README.md
@@ -29,8 +29,8 @@
 You can build and install the Apache Twill by:
 
 ```sh
-    git clone https://git-wip-us.apache.org/repos/asf/incubator-twill.git
-    cd incubator-twill
+    git clone https://git-wip-us.apache.org/repos/asf/twill.git
+    cd twill
     mvn install
 ```