Add full-chain cert reference to test certs doc

Author: kgremban

articles/iot-edge/how-to-create-test-certificates.md

@@ -4,7 +4,7 @@ description: Create test certificates and learn how to install them on an Azure
 author: kgremban
 manager: philmea
 ms.author: kgremban
-ms.date: 02/26/2020
+ms.date: 04/14/2020
 ms.topic: conceptual
 ms.service: iot-edge
 services: iot-edge
@@ -242,8 +242,9 @@ New-CACertsEdgeDeviceIdentity "<name>"
 
 The name that you pass in to this command will be the device ID for the IoT Edge device in IoT Hub.
 
-The new device identity command creates several certificate and key files, including two that you'll use when creating an individual enrollment in DPS and installing the IoT Edge runtime:
+The new device identity command creates several certificate and key files, including three that you'll use when creating an individual enrollment in DPS and installing the IoT Edge runtime:
 
+* `<WRKDIR>\certs\iot-edge-device-identity-<name>-full-chain.cert.pem`
 * `<WRKDIR>\certs\iot-edge-device-identity-<name>.cert.pem`
 * `<WRKDIR>\private\iot-edge-device-identity-<name>.key.pem`
 
@@ -257,8 +258,9 @@ Create the IoT Edge device identity certificate and private key with the followi
 
 The name that you pass in to this command will be the device ID for the IoT Edge device in IoT Hub.
 
-The script creates several certificate and key files, including two that you'll use when creating an individual enrollment in DPS and installing the IoT Edge runtime:
+The script creates several certificate and key files, including three that you'll use when creating an individual enrollment in DPS and installing the IoT Edge runtime:
 
+* `<WRKDIR>\certs\iot-edge-device-identity-<name>-full-chain.cert.pem`
 * `<WRKDIR>/certs/iot-edge-device-identity-<name>.cert.pem`
 * `<WRKDIR>/private/iot-edge-device-identity-<name>.key.pem`