Use 0x44 when simulating disconnection response

Author: chengweih001

index.bs

@@ -5543,13 +5543,13 @@ The [=remote end steps=] with command parameters |params| are:
     |simulatedDevice| inside |navigable|'s <a>active window</a>'s <a spec=HTML>associated <code>Navigator</code></a>'s
     [=associated Bluetooth=].
 1. If |simulatedDeviceInstance|.{{[[gatt]]}}.{{[[automatedGATTConnectionResponse]]}} is `"expected"`,
-    set |simulatedDeviceInstance|.{{[[gatt]]}}.{{[[automatedGATTConnectionResponse]]}} to `"disconnection-simulated"`
+    set |simulatedDeviceInstance|.{{[[gatt]]}}.{{[[automatedGATTConnectionResponse]]}} to `0x44`.
 1. Otherwise, <a>clean up the disconnected device</a> |simulatedDeviceInstance|.
 
 </div>
 
 <div class="example">
-A [=local end=] could simulate device gatt disconnection by sending the following message:
+A [=local end=] could simulate device GATT disconnection by sending the following message:
 
 <pre highlight="json">
 {