[Email Security] Add expanded folder feature to changelog (#18890)

* [Email Security] Add expanded folder feature to changelog

* Adding spaces

Author: Maddy-Cloudflare

src/content/changelogs/email-security.yaml

@@ -17,4 +17,8 @@ entries:
     title: Email Security reclassification tab
     description: |-
       Customers can now have more transparency about their team and user submissions. The new Reclassification tab in the Zero Trust dashboard will allow customers to have a full understanding of what submissions they have made and what the outcomes of those submissions are. 
+  - publish_date: "2024-12-19"
+    title: Email Security expanded folder scanning
+    description: |-
+      Microsoft 365 customers can now choose to scan all folders or just the inbox when deploying via the Graph API.