build(deps-dev): bump @cloudflare/vitest-pool-workers (#305)

Bumps [@cloudflare/vitest-pool-workers](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/vitest-pool-workers) from 0.5.27 to 0.5.40.
- [Release notes](https://github.com/cloudflare/workers-sdk/releases)
- [Changelog](https://github.com/cloudflare/workers-sdk/blob/main/packages/vitest-pool-workers/CHANGELOG.md)
- [Commits](https://github.com/cloudflare/workers-sdk/commits/@cloudflare/vitest-pool-workers@0.5.40/packages/vitest-pool-workers)

---
updated-dependencies:
- dependency-name: "@cloudflare/vitest-pool-workers"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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package.json

@@ -21,7 +21,7 @@
   "author": "Ross Chadwick",
   "license": "GPL-3.0-only",
   "devDependencies": {
-    "@cloudflare/vitest-pool-workers": "^0.5.27",
+    "@cloudflare/vitest-pool-workers": "^0.5.40",
     "@cloudflare/workers-types": "^4.20241205.0",
     "@eslint/js": "^9.14.0",
     "@fontsource-variable/space-grotesk": "^5.1.0",