chore(deps): update dependency @cloudflare/vitest-pool-workers to v0.12.18

Author: renovate[bot]

templates/javascript/clients/package.mustache

@@ -132,7 +132,7 @@
   "devDependencies": {
     {{#isAlgoliasearchClient}}
     "@algolia/requester-testing": "{{utilsPackageVersion}}",
-    "@cloudflare/vitest-pool-workers": "0.12.14",
+    "@cloudflare/vitest-pool-workers": "0.12.18",
     "@cloudflare/workers-types": "4.20251115.0",
     "jsdom": "27.4.0",
     "vitest": "4.0.18",