Update README.md (#30)

Signed-off-by: Lubov66 <radolevanja@gmail.com>
Co-authored-by: Will <28876888+willtsai@users.noreply.github.com>

Author: Lubov66

README.md

@@ -1,6 +1,7 @@
 # Radius
 
 [![Radius Website](https://github.com/radius-project/website/actions/workflows/main.yml/badge.svg)](https://github.com/radius-project/website/actions/workflows/main.yml)
+[![License](https://img.shields.io/github/license/radius-project/website)](https://github.com/radius-project/website/blob/main/LICENSE)
 
 This repository contains the source code for the Radius website, available at https://radapp.io.