Update m365-lighthouse-whats-new.md

Added a What's New item to April, as requested by PM.

Author: SKjerland

microsoft-365/lighthouse/m365-lighthouse-whats-new.md

@@ -5,7 +5,7 @@ ms.author: sharik
 author: SKjerland
 manager: scotv
 ms.reviewer: sharonchoi
-ms.date: 5/09/2024
+ms.date: 5/13/2024
 audience: Admin
 ms.topic: article
 ms.service: microsoft-365-lighthouse
@@ -44,6 +44,14 @@ To check out these improvements, in the left navigation pane in Lighthouse, sele
 
 ## April 2024
 
+### Lighthouse RBAC Account Manager role requirement update
+
+You no longer need to have a Microsoft Entra ID P1 license to manage the Lighthouse RBAC Account Manager role. This change means that security groups assigned to the Lighthouse RBAC Account Manager role no longer need to be a role-assignable group. You can now assign any security group, including existing security groups, to the Lighthouse RBAC Account Manager role. 
+
+[Go to the Lighthouse permissions page now ](https://lighthouse.microsoft.com/#view/Microsoft_Intune_MTM/RBAC.ReactView)
+
+To learn more, see [Overview of permissions in Microsoft 365 Lighthouse](m365-lighthouse-overview-of-permissions.md).
+
 ### Apps & services usage on the Tenants page
 
 We've added a new column to the **Tenants** page in Microsoft 365 Lighthouse that shows the apps and services usage of each customer. This helps you identify customers who aren't fully utilizing the potential of Microsoft 365 and might need your guidance or support. The column displays the usage status of four core workloads: core Microsoft apps (Word, Excel, PowerPoint, and OneNote), Teams, storage (SharePoint or OneDrive), and email (Exchange). A customer who has very low or no adoption of any of these workloads is marked as unhealthy. You can use this information to prioritize your actions and reach out to those customers who need more assistance or help setting up their Microsoft 365 subscription.