Update README.md

Author: alex-titarenko

README.md

@@ -1,7 +1,9 @@
 CorsProxy
 
-This project represents a simple CORS proxy server for your web application which could be hosted on https://vercel.com
+This project represents a simple CORS proxy server for your web application, which could be hosted on https://vercel.com
 
 Usage
 
+```
 https://<your-project-name>.vercel.app/api/proxy?url=${encodeURIComponent(urlToProxy)
+```