After rolling out the June Security patch for Nokia 7 today in China, Nokia Mobile has also rolled out the June Android Security update for their flagship Nokia 8 Sirocco. The update is just 71.7 MB in size and you will be notified once the update is available for your device.
If you haven't received the update you can manually check for the update by going to Settings > System > System Update. Do note that, the updates are rolled on in a phased manner and could take some time to reach your device.
What's new in this update
The update just brings the Google's June Android Security patch for the Nokia 8 Sirocco. You can find more about Google's June Security update at Android Security Bulletin.