Update billing.md - updated change related to asset data

Author: DaniHalfin

articles/sentinel/billing.md

@@ -83,10 +83,10 @@ Once onboarded, usage from Microsoft Sentinel workspaces begins to be billed thr
 
 For customers that haven't onboarded to the Microsoft Sentinel data lake and are currently using Auxiliary or Basic logs, see [Manage data retention in a Log Analytics workspace](/azure/azure-monitor/logs/data-retention-archive) and [Azure Monitor pricing](https://azure.microsoft.com/pricing/details/monitor/) for relevant information.
 
-##### Public preview specific considerations for data lake tier metering
+##### Preview specific considerations for data lake tier metering
 
-The following are considerations that are going to apply during Public Preview:
-- Data lake ingestion includes 30-days of retention, **except for asset data** ingested into the lake tier.
+The following are considerations that are going to apply during preview:
+- Data lake ingestion includes 30-days of retention for data ingested directly into the lake.
 - While long-term retention billing will transition to the data lake storage meter for existing customers, data in long-term retention will initially only be accessible through **Microsoft Sentinel > Data lake exploration > Search & restore**.
 - Charges for data lake usage will show in part under a workspace resource and in part under a SentinelPlatformServices resource.
 - Data written to analytics tier using jobs will be charged through the analytics ingestion meter.