hdparm: 9.55 -> 9.56

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/hdparm/versions.

These checks were done:

- built on NixOS
- ran `/nix/store/c646kg7w31rm3rz30n145jf77kjw2dmg-hdparm-9.56/bin/hdparm -h` got 0 exit code
- ran `/nix/store/c646kg7w31rm3rz30n145jf77kjw2dmg-hdparm-9.56/bin/hdparm -V` and found version 9.56
- ran `/nix/store/c646kg7w31rm3rz30n145jf77kjw2dmg-hdparm-9.56/bin/hdparm -h` and found version 9.56
- found 9.56 with grep in /nix/store/c646kg7w31rm3rz30n145jf77kjw2dmg-hdparm-9.56
- directory tree listing: https://gist.github.com/288d8bff26d3af52b38fbd8055ee2aac

pkgs/os-specific/linux/hdparm/default.nix

···
 { stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "hdparm-9.55";
+  name = "hdparm-9.56";
 
   src = fetchurl {
     url = "mirror://sourceforge/hdparm/${name}.tar.gz";
-    sha256 = "1ivdvrzimaayiq03by8mcq0mhmdljndj06h012zkdpw34irnpixm";
+    sha256 = "1np42qyhb503khvacnjcl3hb1dqly68gj0a1xip3j5qhbxlyvybg";
 
   };