galaxyproject.postgresql : Install repository key task broken

[BeebBenjamin]

Our deployment is now failing on RHEL7 due to task Install repository key in galaxyproject.postgresql.

The task tries to fetch from: https://download.postgresql.org/pub/repos/yum/RPM-GPG-KEY-PGDG which no longer exists.

I think this is due to this change to the GPG signatures: https://yum.postgresql.org/news/pgdg-rpm-repo-gpg-key-update/