cmark: 0.27.1 -> 0.28.3

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/ws8c9r62c7wsas7kj1v0svfs57d53dvv-cmark-0.28.3/bin/cmark -h’ got 0 exit code
- ran ‘/nix/store/ws8c9r62c7wsas7kj1v0svfs57d53dvv-cmark-0.28.3/bin/cmark --help’ got 0 exit code
- found 0.28.3 with grep in /nix/store/ws8c9r62c7wsas7kj1v0svfs57d53dvv-cmark-0.28.3
- directory tree listing: https://gist.github.com/890d356ed9766b2fca77baebee346a0e

pkgs/development/libraries/cmark/default.nix

···
 { stdenv, fetchFromGitHub, cmake }:
 
 stdenv.mkDerivation rec {
-  version = "0.27.1";
+  version = "0.28.3";
   name = "cmark-${version}";
 
   src = fetchFromGitHub {
     owner = "jgm";
     repo = "cmark";
     rev = version;
-    sha256 = "06miwq3rl2bighkn6iq7bdwzmvcqa53qwpa0pqjqa8yn44j8ijj8";
+    sha256 = "1lal6n6q7l84njgdcq1xbfxan56qlvr8xaw9m2jbd0jk4y2wkczg";
   };
 
   nativeBuildInputs = [ cmake ];