[README] fix license path

README.md

@@ -10,7 +10,7 @@
 
 > Coin tracking for hackers
 
-[![License](http://img.shields.io/badge/license-Apache-blue.svg)](https://raw.githubusercontent.com/miguelmota/cointop/master/LICENSE.md)
+[![License](http://img.shields.io/badge/license-Apache-blue.svg)](https://raw.githubusercontent.com/miguelmota/cointop/master/LICENSE)
 [![Build Status](https://travis-ci.org/miguelmota/cointop.svg?branch=master)](https://travis-ci.org/miguelmota/cointop)
 [![Go Report Card](https://goreportcard.com/badge/github.com/miguelmota/cointop?)](https://goreportcard.com/report/github.com/miguelmota/cointop)
 [![GoDoc](https://godoc.org/github.com/miguelmota/cointop?status.svg)](https://godoc.org/github.com/miguelmota/cointop)