Fix 18009: add missing steps in update docs
What does this MR do?
Fixes #18009 (closed)
Are there points in the code the reviewer needs to double check?
No.
Why was this MR needed?
To fix some small errors in the update docs.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes #18009 (closed)
No.
To fix some small errors in the update docs.