fix nyaize test

packages/misskey-js/test/nyaize.test.ts

@@ -3,14 +3,13 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { describe, test, assert, afterEach } from 'vitest';
-import { nyaize } from '@/scripts/nyaize.js';
+import { nyaize } from '../src/nyaize.js';
 
 function runTests(cases) {
 	for (const c of cases) {
 		const [input,expected] = c;
 		const got = nyaize(input);
-        assert.strictEqual(got, expected);
+		expect(got).toEqual(expected);
 	}
 }