Move the communicator pause_before_connecting

block to a code block and fix the JSON

website/source/docs/templates/communicator.html.md

@@ -207,11 +207,13 @@ you need Packer to wait before attempting to connect to your guest.
 If you end up in this situation, you can use the template option
 `pause_before_connecting`. By default, there is no pause. For example:
 
+```
 {
-  "communicator": "ssh"
+  "communicator": "ssh",
   "ssh_username": "myuser",
   "pause_before_connecting": "10m"
 }
+```
 
 In this example, Packer will check whether it can connect, as normal. But once
 a connection attempt is successful, it will disconnect and then wait 10 minutes