Fix wrong file versions in update docs (5.2 to 5.3)
Created by: Razer6
Fix versions in update docs for updating from 5.2 to 5.3. Some links still refered to 5.2.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: Razer6
Fix versions in update docs for updating from 5.2 to 5.3. Some links still refered to 5.2.