Fixing alt text

Author: v-dirichards

articles/databox-online/azure-stack-edge-gpu-install-update.md

@@ -157,7 +157,7 @@ Depending on the software version that you are running, install process may diff
 
     Go to the local web UI and then go to **Software update** page. Verify that the Kubernetes update has successfully installed and the software version reflects that.
 
-    ![Software version after update 17](./media/azure-stack-edge-gpu-install-update/portal-update-17.png)
+    ![Screenshot of software version after update 17.](./media/azure-stack-edge-gpu-install-update/portal-update-17.png)
 
 
 Once the device software and Kubernetes updates are successfully installed, the banner notification disappears. 
@@ -241,7 +241,7 @@ This procedure takes around 20 minutes to complete. Perform the following steps
 
 10. After the Kubernetes update is successfully installed, there is no change to the displayed software in **Maintenance** > **Software update**.
 
-    ![update device 6](./media/azure-stack-edge-gpu-install-update/portal-update-17.png)
+    ![Screenshot of update device 6.](./media/azure-stack-edge-gpu-install-update/portal-update-17.png)
 
 ## Next steps
 

includes/azure-stack-edge-install-2110-updates.md

@@ -56,6 +56,6 @@ ms.date: 08/04/2022
 
     Go to the local web UI and then go to **Software update** page. Verify that the device software and Kubernetes are successfully updated and the software version reflects that.
 
-    ![View updated software version in local UI](media/azure-stack-edge-install-2110-updates/portal-update-17.png)
+    ![Screenshot of updated software version in local UI.](media/azure-stack-edge-install-2110-updates/portal-update-17.png)