Update sync submodule to the new location
diff --git a/.gitmodules b/.gitmodules
index 77d0107..86551eb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "sync"]
 	path = sync
-	url = git://github.com/zhenkai/sync.git
+	url = https://github.com/named-data/ChronoSync.git