Replace Bootstrap example link

The current one is not drop-in anymore

Author: gaearon

template/README.md

@@ -255,7 +255,7 @@ import 'bootstrap/dist/css/bootstrap-theme.css';
 import { Navbar, Jumbotron, Button } from 'react-bootstrap';
 ``` 
 
-Now you are ready to use the imported React Bootstrap components within your component hierarchy defined in the render method. Here is an example [`App.js`](https://github.com/manavsehgal/react-eshop/blob/master/src/App.js) redone using React Bootstrap.
+Now you are ready to use the imported React Bootstrap components within your component hierarchy defined in the render method. Here is an example [`App.js`](https://gist.githubusercontent.com/gaearon/85d8c067f6af1e56277c82d19fd4da7b/raw/6158dd991b67284e9fc8d70b9d973efe87659d72/App.js) redone using React Bootstrap.
 
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