fix readme

Author: francescobianco

README.md

@@ -5,9 +5,11 @@
 
   <h1>Openapi® client for Rust</h1>
   <h4>The perfect starting point to integrate <a href="https://openapi.com/">Openapi®</a> within your Rust project</h4>
+
+  ⚡ 👾 ⚡
 </div>
 
----
+## Overview
 
 This client provides an idiomatic Rust interface to the APIs available at [Openapi](https://openapi.com).  
 It simplifies integration with the Openapi Marketplace, offering typed requests, async support, and built-in error handling.  

docs/crates-io.md

@@ -3,11 +3,12 @@
 
 ---
 
+## Overview
+
 This client provides an idiomatic Rust interface to the APIs available at [Openapi](https://openapi.com).  
 It simplifies integration with the Openapi Marketplace, offering typed requests, async support, and built-in error handling.  
 With this SDK you can quickly connect to hundreds of certified APIs and accelerate your digital transformation projects.
 
-
 ## Pre-requisites
 
 Before using the OpenApi IT Rust Client, you will need an account at [openapi.it](https://openapi.it/) and an API key to the sandbox and/or production environment