Address PR review items

Author: ochimo

articles/defender-for-iot/device-builders/media/tutorial-firmware-analysis/defender_portal.png renamed to articles/defender-for-iot/device-builders/media/tutorial-firmware-analysis/defender-portal.png

@@ -21,7 +21,7 @@ For more information, see [Upgrade the Microsoft Defender for IoT micro agent](u
 
 Microsoft Defender for IoT Firmware analysis is now available in public preview. Defender for IoT can analyze your device firmware for common weaknesses and vulnerabilities, and provide insight into your firmware security. This analysis is useful whether you build the firmware in-house or receive firmware from your supply chain. 
 
-For more information, see [Firmware analysis for device builders](overview-firmware-analysis.md)
+For more information, see [Firmware analysis for device builders](overview-firmware-analysis.md).
 
 :::image type="content" source="media/tutorial-firmware-analysis/overview.png" alt-text="Screenshot that shows clicking view results button for a detailed analysis of the firmware image.":::
 

articles/defender-for-iot/device-builders/media/tutorial-firmware-analysis/firmware_details.png renamed to articles/defender-for-iot/device-builders/media/tutorial-firmware-analysis/firmware-details.png

@@ -34,12 +34,12 @@ If this is your first interaction with **Firmware analysis,** then you'll need t
 
 1. Sign into the Azure portal and go to Defender for IoT.
 
-    :::image type="content" source="media/tutorial-firmware-analysis/defender_portal.png" alt-text="Screenshot that shows the Defender for IoT portal.":::
+    :::image type="content" source="media/tutorial-firmware-analysis/defender-portal.png" alt-text="Screenshot that shows the Defender for IoT portal.":::
 
-1. Select **Firmware analysis** 
+1. Select **Firmware analysis**.
 1. Select a region to use for storage.
 
-    :::image type="content" source="media/tutorial-firmware-analysis/select_region.png" alt-text="Screenshot that shows selecting an Azure Region.":::
+    :::image type="content" source="media/tutorial-firmware-analysis/select-region.png" alt-text="Screenshot that shows selecting an Azure Region.":::
 
 ## Upload a firmware image for analysis
 
@@ -70,7 +70,7 @@ The analysis time will vary based on the size of the firmware image and the numb
 
 1. Select the row of the firmware you want to view. The **Firmware overview** pane shows basic data about the firmware on the right.
 
-    :::image type="content" source="media/tutorial-firmware-analysis/firmware_details.png" alt-text="Screenshot that shows clicking the row with the firmware image to see the side panel details.":::
+    :::image type="content" source="media/tutorial-firmware-analysis/firmware-details.png" alt-text="Screenshot that shows clicking the row with the firmware image to see the side panel details.":::
 
 1. Select **View results** to drill down for more details.
 
@@ -102,5 +102,5 @@ After you delete an image, there's no way to retrieve the image or the associate
 
 ## Next steps
 
-For more information, see [Firmware analysis for device builders](overview-firmware-analysis.md)
+For more information, see [Firmware analysis for device builders](overview-firmware-analysis.md).