Update how-to-secure-workspace-vnet.md

Author: vizhur

articles/machine-learning/how-to-secure-workspace-vnet.md

@@ -230,7 +230,8 @@ Azure Container Registry can be configured to use a private endpoint. Use the fo
     ```
 
     > [!IMPORTANT]
-    > Only AzureML Compute cluster of CPU SKU is supported for the image build on compute
+    > Only AzureML Compute cluster of CPU SKU is supported for the image build on compute.
+    > 
     > Your storage account, compute cluster, and Azure Container Registry must all be in the same subnet of the virtual network.
     
     For more information, see the [update()](/python/api/azureml-core/azureml.core.workspace.workspace#update-friendly-name-none--description-none--tags-none--image-build-compute-none--enable-data-actions-none-) method reference.