Replace usage of literalExample

Instead use the new function `literalExpression`. See

  https://github.com/NixOS/nixpkgs/pull/136909

modules/i18n/input-method/fcitx.nix

@@ -17,7 +17,7 @@ in {
       engines = mkOption {
         type = with types; listOf fcitxEngine;
         default = [ ];
-        example = literalExample "with pkgs.fcitx-engines; [ mozc hangul ]";
+        example = literalExpression "with pkgs.fcitx-engines; [ mozc hangul ]";
         description = let
           enginesDrv = filterAttrs (const isDerivation) pkgs.fcitx-engines;
           engines = concatStringsSep ", "

modules/i18n/input-method/fcitx5.nix

@@ -12,7 +12,7 @@ in {
       addons = mkOption {
         type = with types; listOf package;
         default = [ ];
-        example = literalExample "with pkgs; [ fcitx5-rime ]";
+        example = literalExpression "with pkgs; [ fcitx5-rime ]";
         description = ''
           Enabled Fcitx5 addons.
         '';

modules/i18n/input-method/kime.nix

@@ -9,7 +9,7 @@ in {
       config = mkOption {
         type = yamlFormat.type;
         default = { };
-        example = literalExample ''
+        example = literalExpression ''
           {
             daemon = {
               modules = ["Xim" "Indicator"];