Update binder link to use JLab 2

Author: fcollonval

README.md

@@ -1,14 +1,14 @@
 # jupyterlab-git
 
-[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-git/master?urlpath=lab/tree/examples/demo.ipynb) [![Github Actions Status](https://github.com/jupyterlab/jupyterlab-git/workflows/Test/badge.svg)](https://github.com/jupyterlab/jupyterlab-git/actions?query=workflow%3ATest) [![Version](https://img.shields.io/npm/v/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/pypi/v/jupyterlab-git.svg)](https://pypi.org/project/jupyterlab-git/) [![Downloads](https://img.shields.io/npm/dm/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/conda/vn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git) [![Downloads](https://img.shields.io/conda/dn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git)<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-git/jlab-2?urlpath=lab/tree/examples/demo.ipynb) [![Github Actions Status](https://github.com/jupyterlab/jupyterlab-git/workflows/Test/badge.svg)](https://github.com/jupyterlab/jupyterlab-git/actions?query=workflow%3ATest) [![Version](https://img.shields.io/npm/v/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/pypi/v/jupyterlab-git.svg)](https://pypi.org/project/jupyterlab-git/) [![Downloads](https://img.shields.io/npm/dm/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/conda/vn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git) [![Downloads](https://img.shields.io/conda/dn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git)<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
 [![All Contributors](https://img.shields.io/badge/all_contributors-16-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 A JupyterLab extension for version control using Git
 
 ![ui_glow_up](./docs/figs/preview.gif)
 
-To see the extension in action, open the example notebook included in the Binder [demo](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-git/master?urlpath=lab/tree/examples/demo.ipynb).
+To see the extension in action, open the example notebook included in the Binder [demo](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-git/jlab-2?urlpath=lab/tree/examples/demo.ipynb).
 
 ## Prerequisites