provisioner/windows-restart: Add HCL2 example to documentation

website/pages/docs/provisioners/windows-restart.mdx

@@ -26,12 +26,25 @@ so Windows must be completely booted in order to continue.
 
 The example below is fully functional.
 
+<Tabs>
+<Tab heading="JSON">
+
 ```json
 {
   "type": "windows-restart"
 }
 ```
 
+</Tab>
+<Tab heading="HCL2">
+
+```hcl
+provisioner "windows-restart" {}
+```
+
+</Tab>
+</Tabs>
+
 ## Configuration Reference
 
 The reference of available configuration options is listed below.
@@ -64,6 +77,9 @@ Optional parameters:
 - `restart_check_command` (string) - A command to execute to check if the
   restart succeeded. This will be done in a loop. Example usage:
 
+<Tabs>
+<Tab heading="JSON">
+
 ```json
 {
   "type": "windows-restart",
@@ -71,6 +87,18 @@ Optional parameters:
 }
 ```
 
+</Tab>
+<Tab heading="HCL2">
+
+```hcl
+provisioner "windows-restart" {
+  restart_check_command = "powershell -command \"& {Write-Output 'restarted.'}\""
+}
+```
+
+</Tab>
+</Tabs>
+
 - `restart_timeout` (string) - The timeout to wait for the restart. By
   default this is 5 minutes. Example value: `5m`. If you are installing
   updates or have a lot of startup services, you will probably need to