doc: update intro

README.md

@@ -1,10 +1,12 @@
 # gradio-walkthrough
  
 ## App 1: Visual Exploration of AirBnB Listings in NYC using [pygwalker](https://github.com/Kanaries/pygwalker)
-> [pygwalker]() is a python library that turn your dataframe/dataconnection into an interactive visualization module which allows your to analysis the data with drag-and-drop/chat interface, like tableau/powerBI.
+> [pygwalker]() is a Python library that turns your dataframe/data connection into an interactive visualization module that allows you to analysis the data with drag-and-drop/chat interface, like tableau/powerBI.
 
 Run the app
 
 ```bash
 python app.py
-```
+```
+
+<img width="1441" alt="pygwalker-dradio" src="https://github.com/ObservedObserver/gradio-walkthrough/assets/22167673/45a0cb53-360a-4dad-b0c9-e8583f938c99">