this is a lot easier than adding footnote support for just the one instance. if a use case for footnotes appears in the future (e.g. if we wanted to render the nixpkgs manual with nixos-render-docs as well) this decision should be reevaluated.
Update the pinned channel in `md-to-db`, which bumps the Pandoc version, which fixes https://github.com/NixOS/nixpkgs/issues/125511 maybe.