chore(deps): update dependency @cloudflare/vitest-pool-workers to v0.8.18

Author: renovate[bot]

templates/javascript/clients/package.mustache

@@ -132,7 +132,7 @@
   "devDependencies": {
     {{#isAlgoliasearchClient}}
     "@algolia/requester-testing": "{{utilsPackageVersion}}",
-    "@cloudflare/vitest-pool-workers": "0.8.15",
+    "@cloudflare/vitest-pool-workers": "0.8.18",
     "@cloudflare/workers-types": "4.20250414.0",
     "jsdom": "26.1.0",
     "vitest": "3.1.1",