fix markup
fix markup

Co-authored-by: Eelco Dolstra <a62bb81833b901aa80639248569d9a70b8fe36aa@gmail.com>
rycee/nix,NixOS/nix,rycee/nix,NixOS/nix,rycee/nix,NixOS/nix,NixOS/nix,NixOS/nix,rycee/nix,rycee/nix