Added image in the readme file

RiyaGupta89 · RiyaGupta89 · commit 278f8780cfab · 2021-07-19T09:57:16.000+05:30
diff --git a/React-App/README.md b/React-App/README.md
@@ -36,3 +36,6 @@ npm start
 
 The Application Runs on **localhost:3000**
 
+## Screenshot
+
+![demo](./demo.png)
