PR review edit, relative links

Author: ktoliver

articles/virtual-machines/custom-data.md

@@ -79,7 +79,7 @@ To troubleshoot custom data execution, review the troubleshooting [documentation
 
 ## FAQ
 ### Can I update custom data after the VM has been created?
-For single VMs, custom data in the VM model cannot be updated, but for VMSS, you can update VMSS custom data via [REST API](/rest/api/compute/virtualmachinescalesets/update), [Az CLI](https://docs.microsoft.com/en-us/cli/azure/vmss?view=azure-cli-latest#az_vmss_update), or [Az PowerShell](https://docs.microsoft.com/en-us/powershell/module/az.compute/update-azvmss?view=azps-6.6.0) . When you update custom data in the VMSS model:
+For single VMs, custom data in the VM model cannot be updated, but for VMSS, you can update VMSS custom data via [REST API](/rest/api/compute/virtualmachinescalesets/update), [Az CLI](/cli/azure/vmss?view=azure-cli-latest#az_vmss_update), or [Az PowerShell](/powershell/module/az.compute/update-azvmss?view=azps-6.6.0). When you update custom data in the VMSS model:
 * Existing instances in the VMSS will not get the updated custom data, only until they are reimaged.
 * Existing instances in the VMSS that are upgraded will not get the updated custom data.
 * New instances will receive the new custom data.