BUG #18427: RPM postgis33_15-3.3.6-3PGDG.rhel9.x86_64.rpm not signed

The following bug has been logged on the website:

Bug reference:      18427
Logged by:          Rainer Jung
Email address:      rainer.jung@kippdata.de
PostgreSQL version: 15.6
Operating system:   RHEL 9 x86_64
Description:

The RPM postgis33_15-3.3.6-3PGDG.rhel9.x86_64.rpm downloaded from the repos
pgdg15
(https://download.postgresql.org/pub/repos/yum/15/redhat/rhel-9-x86_64/postgis33_15-3.3.6-3PGDG.rhel9.x86_64.rpm)
is not signed:

rpm -q -i postgis33_15-3.3.6-3PGDG.rhel9.x86_6
...
Signature   : (none)
...

which leads to failed installation attempts using yum.

The previous packages postgis33_15-3.3.6-1PGDG.rhel9.x86_64.rpm and
postgis33_15-3.3.5-1PGDG.rhel9.x86_64.rpm where signed.

Thanks and regards,
Rainer