Update alt-text.

Author: TimShererWithAquent

articles/container-registry/monitor-container-registry.md

@@ -19,7 +19,7 @@ This article describes the monitoring data generated by Azure Container Registry
 
 The **Overview** page in the Azure portal for each registry includes a brief view of recent resource usage and activity, such as push and pull operations. This high-level information is useful, but only a small amount of data is shown there.
 
-:::image type="content" source="media/monitor-service/metrics-overview.png" alt-text="Registry metrics overview":::
+:::image type="content" source="media/monitor-service/metrics-overview.png" alt-text="Screenshot shows the registry metrics overview page displaying four metrics over the last 30 days.":::
 
 [!INCLUDE [horz-monitor-resource-types](~/reusable-content/ce-skilling/azure/includes/azure-monitor/horizontals/horz-monitor-resource-types.md)]
 For more information about the resource types for Container Registry, see [Azure Container Registry monitoring data reference](monitor-container-registry-reference.md).
@@ -43,7 +43,7 @@ See [Create diagnostic setting to collect platform logs and metrics in Azure](..
 
 The following image shows the options when you enable diagnostic settings for a registry.
 
-:::image type="content" source="media/monitor-service/diagnostic-settings.png" alt-text="Diagnostic settings for container registry":::
+:::image type="content" source="media/monitor-service/diagnostic-settings.png" alt-text="Screenshot shows the diagnostic settings for container registry.":::
 
 The metrics and logs you can collect are discussed in the following sections.
 
@@ -109,7 +109,7 @@ ContainerRegistryRepositoryEvents
 
 The following image shows sample output:
 
-:::image type="content" source="media/monitor-service/azure-monitor-query.png" alt-text="Query log data":::
+:::image type="content" source="media/monitor-service/azure-monitor-query.png" alt-text="Screenshot shows Query log data in the Azure portal.":::
 
 Following are queries that you can use to help you monitor your registry resource.
 
@@ -119,7 +119,7 @@ Error events from the last hour:
 union Event, Syslog // Event table stores Windows event records, Syslog stores Linux records
 | where TimeGenerated > ago(1h)
 | where EventLevelName == "Error" // EventLevelName is used in the Event (Windows) records
-	or SeverityLevel== "err" // SeverityLevel is used in Syslog (Linux) records
+    or SeverityLevel== "err" // SeverityLevel is used in Syslog (Linux) records
 ```
 
 100 most recent registry events: