Update tutorial-scale-private-cloud.md

Author: rvandenbedem

articles/azure-vmware/tutorial-scale-private-cloud.md

@@ -27,7 +27,7 @@ You need an existing private cloud to complete this tutorial. If you don't alrea
 
 If you are planning on using the AV64 SKU, define a network for the management and control plane. In your Azure VMware Solution private cloud, under **Manage**, select **Clusters** > **Add a cluster**. Then add the **Address block for AV64 clusters** (one /23 network or three /25 networks) under the **Extended address block** tab.
 
-   :::image type="content" source="media/tutorial-scale-private-cloud/ss1-extended-address-block.png" alt-text="Screenshot showing how to add a cluster to an Azure VMware Solution private cloud." lightbox="media/tutorial-scale-private-cloud/ss1-extended-address-block.png" border="true":::
+   :::image type="content" source="media/tutorial-scale-private-cloud/ss1-extended-address-block.png" alt-text="Screenshot showing how to add an AV64 extended address block to an Azure VMware Solution private cloud." lightbox="media/tutorial-scale-private-cloud/ss1-extended-address-block.png" border="true":::
 
 ## Add a new cluster