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 changelog says a “critical security vulnerability” has been patched so you should install this update to be on safe side. It also includes security patch for July month.
To remind, OTA update rollout usually takes 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 an update or not.