Fix broken links

Author: dominicbetts

articles/iot-pnp/concepts-developer-guide.md

@@ -52,7 +52,7 @@ The model ID announcement has been added to the next versions of the SDKs
 
 ## DPS payload
 
-Devices using the [Device Provisioning Service (DPS)](/iot-dps/) can include the `modelId` to be used during the provisioning process using the following JSON payload.
+Devices using the [Device Provisioning Service (DPS)](../iot-dps/about-iot-dps.md) can include the `modelId` to be used during the provisioning process using the following JSON payload.
 
 ```json
 {

articles/iot-pnp/howto-certify-device.md

@@ -38,7 +38,7 @@ To meet the certification requirements, your device must:
 - Describe the device interactions with a [DTDL v2](https://aka.ms/dtdl) model.
 - Publish the model, and all required interfaces, in the [Azure IoT Public Model Repository](https://devicemodels.azureiotsolutions.com/)
 - Send the model ID during [DPS registration](concepts-developer-guide.md#dps-payload) in the DPS provisioning payload.
-- Announce the model ID during the [MQTT connection](/concepts-developer-guide.md#model-id-announcement).
+- Announce the model ID during the [MQTT connection](concepts-developer-guide.md#model-id-announcement).
 
 ## Test with the Azure IoT Extension CLI