Update AUTHENTICATION.md

markdown fix

Author: MartinPankraz

documentation/AUTHENTICATION.md

@@ -8,8 +8,11 @@
 
 Simply switch on the Microsoft Entra ID option for your App Service on the AZD config [here](../infra/main.bicep) using variable `useEntraIDAuthentication`.
 
-> **Note** - Mind the differences of your webapp auth config-version. You may check via
+> [!NOTE]
+> Mind the differences of your webapp auth config-version. You may check via
+>
 > `az webapp auth config-version show --name <app-name> --resource-group <rg name>`
+>
 > The default is v1. Above mentioned switch activates v2 during bicep deployment. Latest Entra ID authentication requires v2. Note that the Azure portal authentication provider add-experience also creates v2 configuration. [Learn more about upgrading from v1 to v2](https://learn.microsoft.com/cli/azure/webapp/auth/config-version?view=azure-cli-latest#az-webapp-auth-config-version-upgrade)
 >
 > [Learn more about retrieving tokens](https://learn.microsoft.com/azure/app-service/configure-authentication-oauth-tokens#retrieve-tokens-in-app-code)