As always, because this latest update is a security update, we recommend all WordPress users to update to this latest version. The next major release will be WordPress 5.9. WordPress 5.9 is due for release in the last week on January 2022. Stay tuned for updates on 5.9.
You can update to 5.8.3 by going to updates on your WordPress dashboard and clicking update now.
For even more details on this minor security update, you can visit the official WordPress website.