fix(vitest-pool-workers): update peer dependency for vitest to 4.1 (#12867)

Author: edmundhung

.changeset/many-fishes-raise.md

@@ -54,3 +54,4 @@ npx jscodeshift -t https://unpkg.com/@cloudflare/vitest-pool-workers/dist/codemo
 - **`isolatedStorage` & `singleWorker`:** These have been removed in favour of a simpler isolation model that more closely matches Vitest. Storage isolation is now on a per test file basis, and you can make your test files share the same storage by using the Vitest flags `--max-workers=1 --no-isolate`
 - **`import { env, SELF } from "cloudflare:test"`:** These have been removed in favour of `import { env, exports } from "cloudflare:workers"`. `exports.default.fetch()` has the same behaviour as `SELF.fetch()`, except that it doesn't expose Assets. To test your assets, write an integration test using [`startDevWorker()`](https://developers.cloudflare.com/workers/testing/unstable_startworker/)
 - **`import { fetchMock } from "cloudflare:test"`:** This has been removed. Instead, [mock `globalThis.fetch`](https://github.com/cloudflare/workers-sdk/blob/main/fixtures/vitest-pool-workers-examples/request-mocking/test/imperative.test.ts) or use ecosystem libraries like [MSW (recommended)](https://mswjs.io/).
+- **Vitest peer dependency:** `@cloudflare/vitest-pool-workers` now requires `vitest@^4.1.0`.

packages/vitest-pool-workers/package.json

@@ -87,9 +87,9 @@
 		"vitest": "catalog:default"
 	},
 	"peerDependencies": {
-		"@vitest/runner": "4.1.0-beta.4",
-		"@vitest/snapshot": "4.1.0-beta.4",
-		"vitest": "4.1.0-beta.4"
+		"@vitest/runner": "^4.1.0",
+		"@vitest/snapshot": "^4.1.0",
+		"vitest": "^4.1.0"
 	},
 	"volta": {
 		"extends": "../../package.json"