yquake2: 8.20 -> 8.30

pkgs/games/quake2/yquake2/default.nix

···
 
   yquake2 = stdenv.mkDerivation rec {
     pname = "yquake2";
-    version = "8.20";
+    version = "8.30";
 
     src = fetchFromGitHub {
       owner = "yquake2";
       repo = "yquake2";
       rev = "QUAKE2_${builtins.replaceStrings ["."] ["_"] version}";
-      sha256 = "sha256-x1mk6qo03b438ZBS16/f7pzMCfugtQvaRcV+hg7Zc/w=";
+      sha256 = "sha256-2x/qxrhvy+An/HitmWAhmwuDJ2djMeTsLhAtijuvbzE=";
     };
 
     postPatch = ''