Update overview with new Files and Notes APIs

Added new features for file downloads and notes management.

Author: MSFT-Andrea

concepts/whats-new-overview.md

@@ -78,6 +78,10 @@ Use `default`, `notVisible`, and `visible` as supported values for the **approve
 
 Added the **blueprintId** and **source** agent-descriptive properties to [agentRiskDetection](/graph/api/resources/agentriskdetection?view=graph-rest-beta&preserve-view=true) and [riskyAgent](/graph/api/resources/riskyagent?view=graph-rest-beta&preserve-view=true) resources.
 
+### Files
+
+Use the **height** and **width** query parameters on the [driveItem content conversion API](/graph/api/driveitem-get-content-format?view=graph-rest-beta&preserve-view=true) to download a file in another format when `format=jpg`.
+
 ### Mail
 
 Introduced the new notes API that enables users to create and manage simple notes in their *Notes* folder. Notes support text content with optional inline image attachments, and are suitable for quick capture scenarios. Use the [note](/graph/api/resources/note?view=graph-rest-beta&preserve-view=true) resource and the following APIs:
@@ -90,9 +94,6 @@ Introduced the new notes API that enables users to create and manage simple note
 - [List attachments](/graph/api/note-list-attachments?view=graph-rest-beta&preserve-view=true) for a note.
 - [Create an attachment](/graph/api/note-post-attachments?view=graph-rest-beta&preserve-view=true) on a note.
 - [Delete an attachment](/graph/api/attachment-delete?view=graph-rest-beta&preserve-view=true) from a note.
-### Files
-
-Use the **height** and **width** query parameters on the [driveItem content conversion API](/graph/api/driveitem-get-content-format?view=graph-rest-beta&preserve-view=true) to download a file in another format when `format=jpg`.
 
 ### People and workplace intelligence | Profile