MIT-license button: Corrected file-name

Author: MartinOtter

README.md

@@ -3,7 +3,7 @@
 [![Travis](https://travis-ci.org/ModiaSim/Modia.jl.svg?branch=master)](https://travis-ci.org/ModiaSim/Modia.jl)
 [![Coverage Status](https://coveralls.io/repos/github/ModiaSim/Modia.jl/badge.svg?branch=master)](https://coveralls.io/github/ModiaSim/Modia.jl?branch=master)
 [![codecov.io](http://codecov.io/github/ModiaSim/Modia.jl/coverage.svg?branch=master)](http://codecov.io/github/ModiaSim/Modia.jl?branch=master)
-[![The MIT License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](https://github.com/ModiaSim/Modia.jl/blob/master/LICENSE.md)
+[![The MIT License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](https://github.com/ModiaSim/Modia.jl/blob/master/LICENSE)
 
 ## Introduction