fix: use 'prettier' instead of ['flat/prettier'] (#467)

* fix: use 'prettier' instead of ['flat/prettier']

* chore: add changeset

Author: baseballyama

.changeset/mean-turkeys-sit.md

@@ -0,0 +1,5 @@
+---
+'sv': patch
+---
+
+fix: use 'prettier' instead of ['flat/prettier']

packages/addons/common.ts

@@ -31,9 +31,7 @@ export function addEslintConfigPrettier(content: string): string {
 		return content;
 
 	const prettier = common.expressionFromString('prettier');
-	const sveltePrettierConfig = common.expressionFromString(
-		`${svelteImportName}.configs['flat/prettier']`
-	);
+	const sveltePrettierConfig = common.expressionFromString(`${svelteImportName}.configs.prettier`);
 	const configSpread = common.createSpreadElement(sveltePrettierConfig);
 
 	const nodesToInsert = [];