Update requests URL

.gitmodules

@@ -18,7 +18,7 @@
 	url = https://github.com/urllib3/urllib3
 [submodule "third_party/requests_deps/requests"]
 	path = third_party/requests_deps/requests
-	url = https://github.com/kennethreitz/requests
+	url = https://github.com/requests/requests
 [submodule "third_party/python-future"]
 	path = third_party/python-future
 	url = https://github.com/PythonCharmers/python-future