Update app.py

app.py

@@ -234,6 +234,9 @@ To enable Kaggle search, you need to add your Kaggle API credentials as **Reposi
 - `KAGGLE_KEY`: your Kaggle API token (found in the `kaggle.json` file you can download from your Kaggle account)  
 
 Once the secrets are set, you can check the Kaggle box in the UI and search Kaggle datasets directly here.
+
+### Source repository
+- GitHub: https://github.com/hyeonseo2/dataset-search-mcp
         """
     )