New apt repo key version

Hi,

the apt.postgresql.org gpg key has been extended for infinite lifetime
some weeks ago. Bumping the key lifetime every few years for some
extra years into the future was error-prone in the past, and doesn't
really add any security anyway. (If the key were compromised, it
wouldn't help that it expires on end-user systems 4 years later...)

So, here's the new version to be dropped in in place of
https://www.postgresql.org/media/keys/ACCC4CF8.asc

This is the very same file that is already being shipped as part of
pgdg-keyring.deb.

Cheers,
Christoph
--
Senior Berater, Tel.: +49 2166 9901 187
credativ GmbH, HRB Mönchengladbach 12080, USt-ID-Nummer: DE204566209
Trompeterallee 108, 41189 Mönchengladbach
Geschäftsführung: Dr. Michael Meskes, Jörg Folz, Sascha Heuer
pgp fingerprint: 5C48 FE61 57F4 9179 5970 87C6 4C5A 6BAB 12D2 A7AE