Add download counter for github release downloads

README.md

@@ -3,6 +3,7 @@
 [![Build Status](https://github.com/netbootxyz/netboot.xyz/workflows/release/badge.svg)](https://github.com/netbootxyz/netboot.xyz/actions?query=workflow%3Arelease)
 [![Discord](https://img.shields.io/discord/425186187368595466)](https://discord.gg/An6PA2a)
 [![Release](https://img.shields.io/github/v/release/netbootxyz/netboot.xyz?color=hunter%20green)](https://github.com/netbootxyz/netboot.xyz/releases/latest)
+![GitHub all releases](https://img.shields.io/github/downloads/netbootxyz/netboot.xyz/total)
 
 ![netboot.xyz menu](https://netboot.xyz/images/netboot.xyz.gif)