Add missing update docs from 5.2 to 5.3 to 5.3 stable branch
Created by: Razer6
5.3 stable branch is missing update docs from 5.2 to 5.3. This PR contains the fixed update docs from #4385
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: Razer6
5.3 stable branch is missing update docs from 5.2 to 5.3. This PR contains the fixed update docs from #4385