BUG #15762: Download URL not found

The following bug has been logged on the website:

Bug reference:      15762
Logged by:          Adi Mukherjee
Email address:      adi@aire.io
PostgreSQL version: 9.6.3
Operating system:   Centos 7
Description:

The Postgres 9.6.3 download URL
(https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm)
is returning HTTP status code 404.

All the documentation and tutorials I have come across on downloading
Postgres on Centos refer to this URL or similar, but I am finding that no
`pgdg-centos` packages are hosted anymore.