Update README.md, Add KKRainbow/EasyTier

https://github.com/KKRainbow/EasyTier

README.md

@@ -125,6 +125,7 @@ See also [Rust — Production](https://www.rust-lang.org/production) organizatio
 * [defguard](https://github.com/defguard/defguard) — Enterprise Open Source SSO & WireGuard VPN with real 2FA/MFA
 * [denoland/deno](https://github.com/denoland/deno) — A secure JavaScript/TypeScript runtime built with V8 and Tokio [![Build Status](https://github.com/denoland/deno/workflows/ci/badge.svg?branch=master&event=push)](https://github.com/denoland/deno/actions)
 * [doprz/dipc](https://github.com/doprz/dipc) — Convert your favorite images and wallpapers with your favorite color palettes/themes [![crates.io](https://img.shields.io/crates/v/dipc)](https://crates.io/crates/dipc)
+* [KKRainbow/EasyTier](https://github.com/KKRainbow/EasyTier) - A simple, full-featured and decentralized mesh VPN with WireGuard support. [![crates.io](https://img.shields.io/crates/v/easytier)](https://crates.io/crates/easytier) [![GitHub actions](https://github.com/KKRainbow/EasyTier/actions/workflows/rust.yml/badge.svg)](https://github.com/KKRainbow/EasyTier/actions/)
 * [Factotum](https://github.com/snowplow/factotum) — A system to programmatically run data pipelines
 * [fcsonline/drill](https://github.com/fcsonline/drill) — A HTTP load testing application inspired by Ansible syntax
 * [fend](https://github.com/printfn/fend) - Arbitrary-precision unit-aware calculator [![build](https://github.com/printfn/fend/workflows/build/badge.svg)](https://github.com/printfn/fend)