docs: set the right size for the introduction diagram

docs/docs/get-started/introduction.mdx

@@ -10,7 +10,7 @@ import Diagram from '../../src/pages/diagram.svg';
 
 Wasm Workers Server is a framework that allows you to develop and run serverless applications using a lightweight construct called "workers", explained later in the document. The server itself is implemented as a self-contained binary that routes HTTP requests to a WebAssembly runtime that hosts the workers. It looks for `.wasm` and other compatible modules (like [JavaScript](../languages/javascript.md) and [Python](../languages//python.md) files) in the given folder and associate HTTP endpoints based on their path:
 
-<p align="center">
+<p align="center" class="hero__diagram">
   <Diagram />
 </p>