Add link to w3c badge

README.md

@@ -5,7 +5,7 @@ risotto is a minimalist, responsive [hugo](https://gohugo.io) theme inspired by
 [![Hugo Themes](https://img.shields.io/badge/Hugo_Themes-risotto-blue?logo=hugo)](https://themes.gohugo.io/themes/risotto/)
 [![Version](https://img.shields.io/badge/semver-v0.3.0-blue)](https://semver.org)
 ![hugo build status](https://github.com/joeroe/risotto/actions/workflows/hugo-build-exampleSite.yml/badge.svg)
-![W3C Validation](https://img.shields.io/w3c-validation/html?targetUrl=https%3A%2F%2Frisotto.joeroe.io)
+[![W3C Validation](https://img.shields.io/w3c-validation/html?targetUrl=https%3A%2F%2Frisotto.joeroe.io)](https://validator.nu/?doc=https%3A%2F%2Frisotto.joeroe.io)
 ![Code size](https://img.shields.io/github/languages/code-size/joeroe/risotto)
 
 ![Screenshot of the risotto theme](https://raw.githubusercontent.com/joeroe/risotto/master/images/screenshot.png)