Fix documentation link

Author: willtebbutt

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/JuliaDiff/FiniteDifferences.jl.svg?branch=master)](https://travis-ci.org/JuliaDiff/FiniteDifferences.jl)
 [![Windows Build status](https://ci.appveyor.com/api/projects/status/g0gun5dxbkt631am/branch/master?svg=true)](https://ci.appveyor.com/project/JuliaDiff/FiniteDifferences-jl/branch/master)
 [![codecov.io](http://codecov.io/github/JuliaDiff/FiniteDifferences.jl/coverage.svg?branch=master)](http://codecov.io/github/JuliaDiff/FiniteDifferences.jl?branch=master)
-[![Latest Docs](https://img.shields.io/badge/docs-latest-blue.svg)](https://invenia.github.io/FiniteDifferences.jl/latest/)
+[![Latest Docs](https://img.shields.io/badge/docs-latest-blue.svg)](https://juliadiff.github.io/FiniteDifferences.jl/latest/)
 
 FiniteDifferences.jl estimates derivatives with [finite differences](https://en.wikipedia.org/wiki/Finite_difference).