update brew url

Author: spderosso

README.md

@@ -3,7 +3,7 @@ Gitless
 
 [![PyPI version](https://badge.fury.io/py/gitless.png)](
     http://badge.fury.io/py/gitless "PyPI version")
-[![Homebrew Formula](https://img.shields.io/homebrew/v/gitless.svg)](http://braumeister.org/formula/gitless "Homebrew Formula")    
+[![Homebrew Formula](https://img.shields.io/homebrew/v/gitless.svg)](https://formulae.brew.sh/formula/gitless "Homebrew Formula")    
 [![Travis Build Status](https://travis-ci.org/sdg-mit/gitless.png?branch=master)](https://travis-ci.org/sdg-mit/gitless "Travis Build Status")
 [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/sdg-mit/gitless?svg=true)](https://ci.appveyor.com/project/spderosso/gitless "AppVeyor Build Status")