create what's new blurb

Author: austinmccollum

articles/sentinel/ci-cd-custom-content.md

@@ -38,7 +38,7 @@ If you find content in a public repository where you aren't a contributor, first
 
 ## Plan your repository content
 
-Repository content must be stored as [Bicep files](../azure-resource-manager/bicep/file.md) or [Azure Resource Manager (ARM) templates](../azure-resource-manager/templates/overview.md). Bicep is more intuitive and makes it easier to describe Azure resources and Microsoft Sentinel content. Deploy Bicep files alongside of or instead of ARM JSON templates.
+Repository content must be stored as [Bicep files](../azure-resource-manager/bicep/file.md) or [Azure Resource Manager (ARM) templates](../azure-resource-manager/templates/overview.md). Bicep is more intuitive and makes it easier to describe Azure resources and Microsoft Sentinel content. Deploy Bicep files alongside or instead of ARM JSON templates.
 
 | Repository | supported formats |
 |---|---|

articles/sentinel/whats-new.md

@@ -24,13 +24,19 @@ Get notified when this page is updated by copying and pasting the following URL
 
 ## December 2024
 
+- [Bicep template support for repositories (Preview)](#bicep-template-support-for-repositories-preview)
 - [New SOC optimization recommendation based on similar organizations (Preview)](#new-soc-optimization-recommendation-based-on-similar-organizations-preview)
 - [Agentless deployment for SAP applications (Limited preview)](#agentless-deployment-for-sap-applications-limited-preview)
 - [Microsoft Sentinel workbooks now available to view directly in the Microsoft Defender portal](#microsoft-sentinel-workbooks-now-available-to-view-directly-in-the-microsoft-defender-portal)
 - [Unified Microsoft Sentinel solution for Microsoft Business Apps](#unified-microsoft-sentinel-solution-for-microsoft-business-apps)
 - [New documentation library for Microsoft's unified security operations platform](#new-documentation-library-for-microsofts-unified-security-operations-platform)
 - [New S3-based data connector for Amazon Web Services WAF logs (Preview)](#new-s3-based-data-connector-for-amazon-web-services-waf-logs-preview)
 
+### Bicep template support for repositories (Preview)
+Use Bicep templates alongside or as a replacement of ARM JSON templates in Microsoft Sentinel repositories. Bicep provides an intuitive way to create templates of Azure resources and Microsoft Sentinel content items. Not only is it easier to develop new content items, Bicep makes reviewing and updating content easier for anyone that's a part of the continuous integration and delivery of your Microsoft Sentinel content.
+
+For more information, see [Plan your repository content](ci-cd-custom-content.md#plan-your-repository-content).
+
 ### New SOC optimization recommendation based on similar organizations (Preview)
 
 SOC optimization now includes new recommendations for adding data sources to your workspace based on the security posture of other customers in similar industries and sectors as you, and with similar data ingestion patterns. Add the recommended data sources to improve security coverage for your organization.