rPackages.asciicast: Use xz.dev, not lzma.dev

`lzma` is an alias which isn't allowed to be used inside nixpkgs.
See https://github.com/NixOS/nixpkgs/pull/291604#issuecomment-1979935173.

pkgs/development/r-modules/default.nix

@@ -517,7 +517,7 @@ let
 
   packagesWithBuildInputs = {
     # sort -t '=' -k 2
-    asciicast = with pkgs; [ lzma.dev bzip2.dev zlib.dev icu.dev ];
+    asciicast = with pkgs; [ xz.dev bzip2.dev zlib.dev icu.dev ];
     svKomodo = [ pkgs.which ];
     nat = [ pkgs.which ];
     nat_templatebrains = [ pkgs.which ];