Reverting to PNG to fix live site image rendering

Everything with the SVG image looks good until it's published where it is displayed as a broken image and prompts the user to download the image.  This reverts back to the PNG and resolves https://github.com/MicrosoftDocs/azure-docs/issues/88697.

Author: kobulloc-MSFT

articles/virtual-machines/linux/create-ssh-secured-vm-from-template.md

@@ -17,7 +17,7 @@ Learn how to create a Linux virtual machine (VM) by using an Azure Resource Mana
 
 An alternative is to deploy the template from the Azure portal. To open the template in the portal, select the **Deploy to Azure** button.
 
-[![Deploy to Azure](../../media/template-deployments/deploy-to-azure.svg)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2Fquickstarts%2Fmicrosoft.compute%2Fvm-sshkey%2Fazuredeploy.json)
+[![Deploy to Azure](../../media/template-deployments/deploy-to-azure.png)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2Fquickstarts%2Fmicrosoft.compute%2Fvm-sshkey%2Fazuredeploy.json)
 
 ## Templates overview