Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: SoonIter

README.md

@@ -42,6 +42,7 @@ pnpm add path-serializer -D
 ```typescript
 // vitest.setup.ts
 import path from 'node:path';
+import { expect } from 'vitest';
 import { createSnapshotSerializer } from 'path-serializer';
 
 expect.addSnapshotSerializer(