Samsung has started pushing out a new update to its Galaxy A5 (2017) smartphone. Arriving as firmware version A520FXXU2AQF5, the update is currently hitting units in Europe. As for changes, it's basically a stability and performance-enhancing update that weighs in at under 30MB.
Nothing else is included in the update - not even the latest security patch. As is usually the case with OTA roll outs, it might take time for the update to hit your device. Meanwhile, you can manually check for the update by heading to your handset's Settings menu.