docs: update README

Author: francescobianco

README.md

@@ -8,7 +8,7 @@
 
   [![Build Status](https://img.shields.io/github/actions/workflow/status/openapi-it/openapi-nodejs-sdk/node.js.yml?branch=main)](https://github.com/openapi-it/openapi-nodejs-sdk/actions)
   [![npm version](https://img.shields.io/npm/v/@altravia/openapi.svg)](https://www.npmjs.com/package/@altravia/openapi)
-  [![License](https://img.shields.io/github/license/openapi-it/openapi-nodejs-sdk)](LICENSE)
+  [![License](https://img.shields.io/github/license/openapi-it/openapi-nodejs-sdk?v=2)](LICENSE)
   [![Node.js Version](https://img.shields.io/badge/node-14+-green.svg)](https://nodejs.org/)
 </div>
 
@@ -210,4 +210,4 @@ The MIT License is a permissive open-source license that allows you to freely us
 
 In short, you are free to use this SDK in your personal, academic, or commercial projects, with minimal restrictions. The project is provided "as-is", without any warranty of any kind, either expressed or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose, and non-infringement.
 
-For more details, see the full license text at the [MIT License page](https://choosealicense.com/licenses/mit/).
+For more details, see the full license text at the [MIT License page](https://choosealicense.com/licenses/mit/).