Update spec link and text (#27)

Co-authored-by: Thomas Honeyman <admin@thomashoneyman.com>

Author: ursi

README.md

@@ -3,7 +3,7 @@
 [![Latest release](http://img.shields.io/github/release/purescript-web/purescript-web-dom.svg)](https://github.com/purescript-web/purescript-web-dom/releases)
 [![Build status](https://travis-ci.org/purescript-web/purescript-web-dom.svg?branch=master)](https://travis-ci.org/purescript-web/purescript-web-dom)
 
-Type definitions and low level interface implementations for the [WHATWG DOM Standard](https://dom.spec.whatwg.org).
+Type definitions and low level interface implementations for the [WHATWG DOM Living Standard](https://dom.spec.whatwg.org/).
 
 ## Installation