readme fix

README.md

@@ -34,7 +34,7 @@ MLP also supports entity extraction using lists of predefined entities. These li
 * Addresses (Estonian and Russian)
 * Currencies (Estonian, Russian, and English)
 
-## Custom List-based Entities
+### Custom List-based Entities
 MLP also supports defining custom entity lists. Custom lists must be placed in the **entity_mapper** directory residing in **data** directory.
 Entities are defined as JSON files:
 ```