Update azure-monitor-agent-migration.md

Author: guywi-ms

articles/azure-monitor/agents/azure-monitor-agent-migration.md

@@ -56,7 +56,7 @@ Before you begin migrating from the Log Analytics agent to Azure Monitor Agent,
 
     1. Compare the data ingested by Azure Monitor Agent with legacy agent data to ensure there are no gaps. You can do this on any table by using the [join operator](/azure/data-explorer/kusto/query/joinoperator?pivots=azuremonitor) to add the `Category` column from the [Heartbeat](/azure/azure-monitor/reference/tables/heartbeat) table, which indicates `Azure Monitor Agent` for data collected by the Azure Monitor Agent.
 
-        For example:
+        For example, this query adds the `Category` column from the `Heartbeat` table to data retrieved from the `Event` table:
 
         ```kusto
         Heartbeat