Update blog-service/2025-06-17-apps.md

Co-authored-by: Jagadisha V <[email protected]>

Author: amee-sumo

blog-service/2025-06-17-apps.md

@@ -48,7 +48,7 @@ To reinstall the apps, follow the steps below:
 If you’ve created custom content based on CloudTrail fields, manual updates as shown in the below table will be required to accommodate the new schema.
 
 **Field mapping changes**
-|:--|:--|
+- Shifting the `userName` from the `userIdentity` element to `additionalEventData` element.
 | `UserName` | Added under `additionalEventData` |
 | `principalId` | Removed |
 | `userId`<br/>`identityStoreArn`<br/>`credentialId` | Added under `userIdentity` |