Merge pull request #177657 from v-gpettibone/pics21

Updated pic for monitor hub

Author: denrea

articles/iot-hub/media/monitor-iot-hub/metrics-portal.png

@@ -6,7 +6,7 @@ ms.author: robinsh
 ms.topic: conceptual 
 ms.service: iot-hub
 ms.custom: subject-monitoring
-ms.date: 11/06/2020
+ms.date: 10/26/2021
 
 ---
 
@@ -78,7 +78,7 @@ You can analyze metrics for Azure IoT Hub with metrics from other Azure services
 
 In Azure portal, you can select **Metrics** under **Monitoring** on the left-pane of your IoT hub to open metrics explorer scoped, by default, to the platform metrics emitted by your IoT hub:
 
-:::image type="content" source="media/monitor-iot-hub/metrics-portal.png" alt-text="Metrics explorer page for an IoT hub.":::
+:::image type="content" source="media/monitor-iot-hub/metrics-portal.png" alt-text="Screenshot showing the metrics explorer page for an IoT hub." border="true":::
 
 For a list of the platform metrics collected for Azure IoT Hub, see [Metrics in the Monitoring Azure IoT Hub data reference](monitor-iot-hub-reference.md#metrics). For a list of the platform metrics collected for all Azure services, see [Supported metrics with Azure Monitor](../azure-monitor/essentials/metrics-supported.md).