fix: Icon for N4A on home landing page

Author: lamATnginx

content/_index.md

@@ -43,7 +43,7 @@ Learn how to deliver, manage, and protect your applications using F5 NGINX produ
 {{</card-section>}}
 
 {{<card-section showAsCards="true" title="NGINX as a Service">}}
-  {{<card title="NGINX as a Service for Azure" titleUrl="/nginxaas/azure/" brandIcon="NGINX-for-Azure-product-icon.png" isLanding="true">}}
+  {{<card title="NGINX as a Service for Azure" titleUrl="/nginxaas/azure/" brandIcon="NGINX-for-Azure-product-icon.svg" isLanding="true">}}
     Infrastructure-as-a-Service (IaaS) version of NGINX Plus for your Microsoft Azure application stack
   {{</card >}}
 {{</card-section>}}