Update README.md

hw2/README.md

@@ -20,7 +20,7 @@ https://www.dropbox.com/s/vq5dyl5hwfhbw98/Amazon.csv?dl=0
 https://www.dropbox.com/s/fbys7cqnbl3ch1s/Amzon_GoogleProducts_perfectMapping.csv?dl=0
 https://www.dropbox.com/s/o6rqmscmv38rn1v/GoogleProducts.csv?dl=0
 ```
-Download each of the files and put it into your `hw3` folder.
+Download each of the files and put it into your `hw2` folder.
 
 Before we can get started, let us understand the main APIs in this project. We have provided a file named `core.py` for you. This file loads and processes the data that you've just downloaded. For example, you can load the Amazon catalog with the `amazon_catalog()` function. This returns an iterator over data tuples in the Amazon catalog. The fields are id, title, description, mfg (manufacturer), and price if any:
 ```