submodule: update submodule remote repo uri

Change-Id: I5fea4be4b914ab2bfd8c3226598daa2fe2945e06
diff --git a/.gitmodules b/.gitmodules
index f06b3d2..ef6b513 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "ChronoSync"]
 	path = ChronoSync
-	url = https://github.com/named-data/ChronoSync.git
-	branch = dev
+	url = https://github.com/bruinfish/ChronoSync.git
+	branch = security