Update README.md

Author: araujo88

README.md

@@ -3,7 +3,7 @@
 [![license](https://img.shields.io/badge/license-GPL-green)](https://raw.githubusercontent.com/araujo88/teapot/main/LICENSE)
 [![build](https://github.com/araujo88/teapot/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/araujo88/teapot/actions/workflows/build.yml)
 
-A simple and lightweight multi-threaded web framework in C++ that serves static websites.
+A simple and lightweight asynchronous web framework in C++ that serves static websites.
 
 ## Getting started