Update dependency @cloudflare/vitest-pool-workers to ^0.9.0

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
 		"format": "prettier --write src/"
 	},
 	"devDependencies": {
-		"@cloudflare/vitest-pool-workers": "^0.8.19",
+		"@cloudflare/vitest-pool-workers": "^0.9.0",
 		"prettier": "^3.5.3",
 		"typescript": "^5.5.2",
 		"vitest": "~3.2.0",