Change readme link from HTML to markdown

Author: ccbrown

README.md

@@ -1,6 +1,6 @@
 # Welcome! [![Build Status](https://travis-ci.org/ccbrown/gggtracker.svg?branch=master)](https://travis-ci.org/ccbrown/gggtracker)
 
-This is the repository for <a href="https://gggtracker.com" target="_blank">gggtracker.com</a>. If there's something you think the site is missing, please either a.) open an issue to request the feature or b.) develop the feature yourself and put in a pull request.
+This is the repository for [gggtracker.com](https://gggtracker.com). If there's something you think the site is missing, please either a.) open an issue to request the feature or b.) develop the feature yourself and put in a pull request.
 
 ### Development