gnused: 4.4 -> 4.5

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

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

These checks were done:

- built on NixOS
- ran `/nix/store/71dzrirkbkpna9l1mcbjjhdws2y1g1hj-gnused-4.5/bin/sed --help` got 0 exit code
- ran `/nix/store/71dzrirkbkpna9l1mcbjjhdws2y1g1hj-gnused-4.5/bin/sed --version` and found version 4.5
- ran `/nix/store/71dzrirkbkpna9l1mcbjjhdws2y1g1hj-gnused-4.5/bin/sed --help` and found version 4.5
- found 4.5 with grep in /nix/store/71dzrirkbkpna9l1mcbjjhdws2y1g1hj-gnused-4.5
- directory tree listing: https://gist.github.com/20a2031e4b27616ba71439622e5fe4d1

pkgs/tools/text/gnused/default.nix

@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "gnused-${version}";
-  version = "4.4";
+  version = "4.5";
 
   src = fetchurl {
     url = "mirror://gnu/sed/sed-${version}.tar.xz";
-    sha256 = "0fv88bcnraixc8jvpacvxshi30p5x9m7yb8ns1hfv07hmb2ypmnb";
+    sha256 = "0h3b2jfj57wmz680vkbyavlsrkak556qhvs7m7fdlawwhg477bbs";
   };
 
   outputs = [ "out" "info" ];