Merge pull request #174911 from DaleKoetke/patch-16

Update manage-cost-storage.md

Author: PRMerger18

articles/azure-monitor/logs/manage-cost-storage.md

@@ -147,6 +147,8 @@ The Per Node pricing tier charges per monitored VM (node) on an hour granularity
 
 Workspaces created before April 2016 can continue to use the **Standard** and **Premium** pricing tiers that have fixed data retention of 30 days and 365 days, respectively. New workspaces can't be created in the **Standard** or **Premium** pricing tiers, and if a workspace is moved out of these tiers, it can't be moved back. Data ingestion meters on your Azure bill for these legacy tiers are called "Data analyzed."
 
+### Legacy pricing tiers and Azure Defender (Security Center)
+
 There are also some behaviors between the use of legacy Log Analytics tiers and how usage is billed for [Azure Defender (Security Center)](../../security-center/index.yml). 
 
 - If the workspace is in the legacy Standard or Premium tier, Azure Defender is billed only for Log Analytics data ingestion, not per node.