update astronvim to v3

config/astronvim/lua/user/plugins/null-ls.lua

@@ -1,16 +1,18 @@
-return function(config)
-	local null_ls = require("null-ls")
-	config.sources = {
-		null_ls.builtins.formatting.prettierd.with({
-			disabled_filetypes = { "markdown" },
-		}),
+return {
+	"jose-elias-alvarez/null-ls.nvim",
+	opts = function(opts)
+		local null_ls = require("null-ls")
+		opts.sources = {
+			null_ls.builtins.formatting.prettierd.with({
+				disabled_filetypes = { "markdown" },
+			}),
 
-		null_ls.builtins.formatting.phpcsfixer.with({
-			extra_args = {
-				"--config",
-				"$HOME/.config/php-cs-fixer-conf.php",
-			},
-		}),
-	}
-	return config
-end
+			null_ls.builtins.formatting.phpcsfixer.with({
+				extra_args = {
+					"--config",
+					"$HOME/.config/php-cs-fixer-conf.php",
+				},
+			}),
+		}
+	end,
+}