Rewrite code samples README

Author: kengaderdus

1-Authentication/5-sign-in-express/README.md

@@ -90,7 +90,8 @@ When you use Microsoft Graph PowerShell, you automatically register the applicat
 
 > Other ways of running the scripts are described in [App Creation Scripts guide](./AppCreationScripts/AppCreationScripts.md). The scripts also provides a guide to automated application registration, configuration and removal which can help in your CI/CD scenarios.
 
-> :exclamation: NOTE: This sample can make use of client certificates. You can use **AppCreationScripts** to register an Microsoft Entra ID application with certificates. For more information see, [Use client certificate for authentication in your Node.js web app instead of client secrets](https://review.learn.microsoft.com/entra/external-id/customers/how-to-web-app-node-use-certificate).
+> [!NOTE]
+> This sample can make use of client certificates. You can use **AppCreationScripts** to register an Microsoft Entra ID application with certificates. For more information see, [Use client certificate for authentication in your Node.js web app instead of client secrets](https://review.learn.microsoft.com/entra/external-id/customers/how-to-web-app-node-use-certificate).
 
 </details>