plugins/copilot-vim: bump node.js to 20.x version

Author: HeitorAugustoLN

plugins/by-name/copilot-vim/default.nix

@@ -24,8 +24,8 @@ lib.nixvim.plugins.mkVimPlugin {
   settingsOptions = {
     node_command = mkOption {
       type = with types; nullOr str;
-      default = lib.getExe pkgs.nodejs-18_x;
-      defaultText = lib.literalExpression "lib.getExe pkgs.nodejs-18_x";
+      default = lib.getExe pkgs.nodejs_20;
+      defaultText = lib.literalExpression "lib.getExe pkgs.nodejs_20";
       description = "Tell Copilot what `node` binary to use.";
     };