added the github link

Author: Turupawn

src/content/docs/en/developers/what-to-build/stablecoin-payments-tutorial.mdx

@@ -16,6 +16,10 @@ import nftRecipt from "../../../../../assets/images/developers/stablecoin-paymen
 
 Welcome to the Scroll Stablecoin Payments Tutorial. This guide walks you through building a dApp that processes USDT payments and mints NFTs as receipts, from smart contract development to frontend integration.
 
+<Aside type="note" title="Complete Example">
+  You can find the complete working example of this tutorial in our [GitHub repository](https://github.com/Turupawn/scroll-payments-demo). Feel free to clone it and experiment with the code!
+</Aside>
+
 ## What You'll Build
 
 By the time you're done, you'll have: