Fix formatting in state show command examples

[AntoineJo]

Fixing typo in powershell state show for for_each resources
--> what is documented don't work:

terraform state show 'module.demoaas.module.vmclient[\"rayt\"].null_resource.image_version_tracker'
Error parsing instance address: module.demoaas.module.vmclient[\"rayt\"].null_resource.image_version_tracker

This command requires that the address references one specific instance.
To view the available instances, use "terraform state list". Please modify
the address to reference a specific instance.

--> the fix

terraform state show 'module.demoaas.module.vmclient["rayt"].null_resource.image_version_tracker'
# module.demoaas.module.vmclient["rayt"].null_resource.image_version_tracker:
resource "null_resource" "image_version_tracker" {
    id       = "7983134432509615754"
    triggers = {
        "image_version" = "1.0.0"
    }
}

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[crw]

Thanks for the fix, @AntoineJo! Please sign the CLA and we will review your change.