Fixing the description for param Path

Bringing the description of the `Path` param up to date with the one in the [code](https://github.com/Azure/azure-powershell/blob/master/src/ResourceManager/Compute/Commands.Compute/VirtualMachine/Action/SaveAzureVMImageCommand.cs#L64).

Fix for issue #6383

Author: praries880

src/ResourceManager/Compute/Commands.Compute/help/Save-AzureRmVMImage.md

@@ -147,7 +147,7 @@ Accept wildcard characters: False
 ```
 
 ### -Path
-Specifies the path of the VHD.
+The file path in which the template of the captured image is stored.
 
 ```yaml
 Type: String