fixed the formatting issue, and added property alt text

Author: spelluru

articles/service-bus-messaging/service-bus-dead-letter-queues.md

@@ -24,7 +24,8 @@ There's no automatic cleanup of the DLQ. Messages remain in the DLQ until you ex
 ## DLQ message count
 
 It's not possible to obtain count of messages in the dead-letter queue at the topic level. That's because messages don't sit at the topic level. Instead, when a sender sends a message to a topic, the message is forwarded to subscriptions for the topic within milliseconds and thus no longer resides at the topic level. So, you can see messages in the DLQ associated with the subscription for the topic. In the following example, **Service Bus Explorer** shows that there are 62 messages currently in the DLQ for the subscription "test1". 
-![DLQ message count](./media/service-bus-dead-letter-queues/dead-letter-queue-message-count.png)
+
+:::image type="content" source="./media/service-bus-dead-letter-queues/dead-letter-queue-message-count.png" alt-text="Image showing 62 messages in the dead-letter queue.":::
 
 You can also get the count of DLQ messages by using Azure CLI command: [`az servicebus topic subscription show`](/cli/azure/servicebus/topic/subscription#az-servicebus-topic-subscription-show).