The Samsung has started pushing a new update for Galaxy A5 (2016) and A7 (2016) in India. As for changes, it does not make any visible change as it is weighted only 40MB in Size. The change log says a “critical security vulnerability” has been patched so you should install this update to be on safe side. It also include security patch of July month.
To remind, OTA update roll out usually take some time to hit targeted device. If you still not get this update you can wait or just visit setting menu and check it manually whether you get update or not.