[Email Security] Add email reclassifications to changelog (#18888)

Author: Maddy-Cloudflare

src/content/changelogs/email-security.yaml

@@ -13,3 +13,8 @@ entries:
     title: Microsoft Graph API deployment.
     description: |-
       Customers using Microsoft Office 365 can set up Email Security via Microsoft Graph API.
+  - publish_date: "2024-12-19"
+    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. 
+