Update avere-vfxt-prereqs.md with latest az cli

Author: ronhogue

articles/avere-vfxt/avere-vfxt-prereqs.md

@@ -73,7 +73,7 @@ To accept the software terms in advance:
 1. Issue this command to accept service terms and enable programmatic access for the Avere vFXT for Azure software image:
 
    ```azurecli
-   az vm image accept-terms --urn microsoft-avere:vfxt:avere-vfxt-controller:latest
+   az vm image terms accept --urn microsoft-avere:vfxt:avere-vfxt-controller:latest
    ```
 
 ## Create a storage service endpoint in your virtual network (if needed)
@@ -101,4 +101,4 @@ Create the storage service endpoint from the Azure portal.
 
 ## Next steps
 
-After completing these prerequisites, you can create the cluster. Read [Deploy the vFXT cluster](avere-vfxt-deploy.md) for instructions.
+After completing these prerequisites, you can create the cluster. Read [Deploy the vFXT cluster](avere-vfxt-deploy.md) for instructions.