Provide or update SaltStack repository for RedHat servers

Summary:
As the GPG key name has changed to SALT-PROJECT-GPG-PUBKEY-2023,
update the repository information.

Based on repository file on Dwellers.

Reference: https://saltproject.io/salt-3006-is-here/

Test Plan: dnf update

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D3127