Make it more clear that nightly builds can be downloaded

README.md

@@ -1,7 +1,7 @@
 [![Downloads](https://img.shields.io/github/downloads/diasurgical/devilutionX/total.svg)](https://github.com/diasurgical/devilutionX/releases)
 [![github stars](https://img.shields.io/github/stars/diasurgical/devilutionX.svg)](https://github.com/diasurgical/devilutionX/stargazers)
 
-Status | Platform
+Nightly builds | Platform
 ---:| ---
 [![CircleCI](https://circleci.com/gh/diasurgical/devilutionX.svg?style=svg)](https://circleci.com/gh/diasurgical/devilutionX) | Linux 32bit & 64bit, Windows 32bit, Nintendo Switch, SDL1
 [![Build Status](https://travis-ci.org/diasurgical/devilutionX.svg?branch=master)](https://travis-ci.org/diasurgical/devilutionX) | macOS 64bit