update models

2_handling-duplicates.md

@@ -68,7 +68,7 @@ This simple bit of linking means that:
 
 ## De-duping with a window function
 
-There is some temptation to handle this de-duplication in this stage. Instead lets add another folder in your `modules` folder called `prep` that handles the deduplication.
+There is some temptation to handle this de-duplication in this stage. Instead lets add another folder in your `models` folder called `prep` that handles the deduplication.
 
 Inside this folder, add a new model called `prep_ticker_info.sql`. We can use a traditional de-duplication method here - window functions.