neovim: use nixpkgs-fmt instead of nixfmt

programs/neovim/default.nix

@@ -33,7 +33,7 @@
 
       # Nix
       nil
-      nixfmt
+      nixpkgs-fmt
 
       # TypeScript
       nodePackages.typescript-language-server

programs/neovim/lua/plugins/none-ls.lua

@@ -5,7 +5,7 @@ return {
   "nvimtools/none-ls.nvim",
   opts = function(_, config)
     -- config variable is the default configuration table for the setup function call
-    local null_ls = require "null-ls"
+    local null_ls = require("null-ls")
 
     -- Check supported formatters and linters
     -- https://github.com/nvimtools/none-ls.nvim/tree/main/lua/null-ls/builtins/formatting
@@ -14,7 +14,7 @@ return {
       -- Set a formatter
       -- null_ls.builtins.formatting.stylua,
       -- null_ls.builtins.formatting.prettier,
-      null_ls.builtins.formatting.nixfmt,
+      null_ls.builtins.formatting.nixpkgs_fmt,
       null_ls.builtins.formatting.prettier,
       null_ls.builtins.formatting.stylua,
     }