Today they all get new bugfix source releases with updated translations. The full changelog can be found at https://kde.org/announcements/changelogs/gear/21.08.3/
The released code has been GPG-signed using the following key: http://pgp.mit.edu/pks/lookup?op=get&search=0xD81C0CB38EB725EF6691C385BB463350D6EF31EF