Request: Add zstd support for RPMs

In RHEL9, the [default compression algorithm](https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/considerations_in_adopting_rhel_9/assembly_software-management_considerations-in-adopting-rhel-9) is now zstd. Please add support for packaging RPMs using zstd compression.

Thank you for the wonderful project and consideration.