Update binder link

Author: robertdstein

README.md

@@ -1,5 +1,5 @@
 # flarestack
-[![Documentation Status](https://readthedocs.org/projects/flarestack/badge/?version=latest)](https://flarestack.readthedocs.io/en/latest/?badge=latest) [![Build Status](https://travis-ci.org/icecube/flarestack.svg?branch=master)](https://travis-ci.org/icecube/flarestack) [![PyPI version](https://badge.fury.io/py/flarestack.svg)](https://badge.fury.io/py/flarestack) [![Coverage Status](https://coveralls.io/repos/github/icecube/flarestack/badge.svg?branch=master)](https://coveralls.io/github/icecube/flarestack?branch=master) [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/IceCubeOpenSource/flarestack/master) [![DOI](https://zenodo.org/badge/127512114.svg)](https://zenodo.org/badge/latestdoi/127512114)
+[![Documentation Status](https://readthedocs.org/projects/flarestack/badge/?version=latest)](https://flarestack.readthedocs.io/en/latest/?badge=latest) [![Build Status](https://travis-ci.org/icecube/flarestack.svg?branch=master)](https://travis-ci.org/icecube/flarestack) [![PyPI version](https://badge.fury.io/py/flarestack.svg)](https://badge.fury.io/py/flarestack) [![Coverage Status](https://coveralls.io/repos/github/icecube/flarestack/badge.svg?branch=master)](https://coveralls.io/github/icecube/flarestack?branch=master) [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/icecube/flarestack/master) [![DOI](https://zenodo.org/badge/127512114.svg)](https://zenodo.org/badge/latestdoi/127512114)
 
 
 Code for unbinned likelihood analysis of astroparticle physics data, created by [@robertdstein](https://github.com/robertdstein).