Changes since 2023.4:
* Add automatic signing keys for trixie
* Add Debian Stable Release Key (13/trixie) (ID: 762F67A0B2C39DE4)
* Clean up maintscript removal of ancient archive certificates
* Get rid of team-members/ and signature verification
* Remove buster keys
* Rename keyrings from .gpg to .pgp
* Use OpenPGP instead of GnuPG when referring to the specification