(AzureCXP) fixes MicrosoftDocs/azure-compute-docs-pr#494501

Updated line number 135
From 
$image
To
$imageConfig

Author: v-rakegurram-MSFT

articles/virtual-machines/capture-image-resource.yml

@@ -132,7 +132,7 @@ procedureSection:
         Create the image configuration.
 
         ```azurepowershell-interactive
-        $image = New-AzImageConfig -Location $location -SourceVirtualMachineId $vm.Id 
+        $imageConfig = New-AzImageConfig -Location $location -SourceVirtualMachineId $vm.Id 
         ```
       - |
         Create the image.