Update README.md

suyash248 · web-flow · commit 3deefd8935ce · 2019-06-20T13:32:44.000+05:30
diff --git a/README.md b/README.md
@@ -462,5 +462,5 @@ results = session.query(NotificationGroup).filter(
 
 Pull requests are welcome! Please create new pull requests from `dev` branch.
 
-## Overview
+## TODO
  - Support for `JSON` columns.
