docs: add Git Sponsors badge to README (#95)

Author: irensaltali

README.md

@@ -5,6 +5,8 @@
     </h1>
 </div>
 
+[<img src="https://api.gitsponsors.com/api/badge/img?id=737526274" height="20">](https://api.gitsponsors.com/api/badge/link?p=zGF0mvB4EVuuLcG20aJcGQMnJaXZqfDmcCY3ebXkwxHa6g4kiTjId1/7zUTzRbxG+LvjW9ss0ldVF7LkB8pXDQ==)
+
 [![JWT COMPATIBLE](https://jwt.io/img/badge-compatible.svg)]()
 
 Welcome to the Serverless API Gateway, an innovative tool designed to streamline your API management tasks using the powerful capabilities of Cloudflare Workers.