unciv: 4.8.9-patch2 -> 4.8.13

pkgs/games/unciv/default.nix

···
 in
 stdenv.mkDerivation rec {
   pname = "unciv";
-  version = "4.8.9-patch2";
+  version = "4.8.13";
 
   src = fetchurl {
     url = "https://github.com/yairm210/Unciv/releases/download/${version}/Unciv.jar";
-    hash = "sha256-ek2FDzo7EbgZGbQyZ6mBmVoPRKkJu0JFewbVvsGzZMA=";
+    hash = "sha256-16TpsKNLcm6lbi4exYxDZWfmRsvfAhT1ktP36zC9Psg=";
   };
 
   dontUnpack = true;