Update HTML spec link and text (#34)

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

Author: ursi

README.md

@@ -4,7 +4,7 @@
 [![Build status](https://github.com/purescript-web/purescript-web-html/workflows/CI/badge.svg?branch=master)](https://github.com/purescript-web/purescript-web-html/actions?query=workflow%3ACI+branch%3Amaster)
 [![Pursuit](https://pursuit.purescript.org/packages/purescript-web-html/badge)](https://pursuit.purescript.org/packages/purescript-web-html)
 
-Type definitions and low level interface implementations for the [WHATWG HTML Standard](https://html.spec.whatwg.org).
+Type definitions and low level interface implementations for the [WHATWG HTML Living Standard](https://html.spec.whatwg.org).
 
 ## Installation