doc: replace "above" and "below" where appropriate
Sometimes, the docs reference relevant text using "above" and "below". Some of these references became incorrect after the documentation was resorted (#3662).
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Sometimes, the docs reference relevant text using "above" and "below". Some of these references became incorrect after the documentation was resorted (#3662).