Update billing-monitor-costs.md

Author: EdB-MSFT

articles/sentinel/billing-monitor-costs.md

@@ -144,7 +144,7 @@ To help you control your Analytics tier budget, you can create a cost management
 
 The Microsoft Sentinel GitHub community provides the [`Send-IngestionCostAlert`](https://github.com/Azure/Azure-Sentinel/tree/master/Playbooks/Send-IngestionCostAlert) cost management playbook on GitHub. This playbook is activated by a recurrence trigger, and gives you a high level of flexibility. You can control execution frequency, ingestion volume, and the message to trigger, based on your requirements.
 
-## Manage and monitor costs for the Data lake tier
+## Manage and monitor costs for the data lake tier
 
 Once onboarded, usage of data lake tier capabilities is billed using new Microsoft Sentinel data lake meters. For more information on the new meters, see [Data lake tier](billing.md#data-lake-tier).