Bump @cloudflare/vitest-pool-workers in /packages/worker

Bumps [@cloudflare/vitest-pool-workers](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/vitest-pool-workers) from 0.7.8 to 0.8.22.
- [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/[email protected]/packages/vitest-pool-workers)

---
updated-dependencies:
- dependency-name: "@cloudflare/vitest-pool-workers"
  dependency-version: 0.8.22
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/worker/package.json

@@ -15,7 +15,7 @@
 	"license": "Apache-2.0",
 	"devDependencies": {
 		"@babel/preset-env": "^7.26.9",
-		"@cloudflare/vitest-pool-workers": "^0.7.7",
+		"@cloudflare/vitest-pool-workers": "^0.8.22",
 		"@cloudflare/workers-types": "^4.20250327.0",
 		"@eslint/js": "^9.23.0",
 		"@typescript-eslint/eslint-plugin": "^8.28.0",