chore(deps-dev): bump @cloudflare/workers-types

Bumps [@cloudflare/workers-types](https://github.com/cloudflare/workerd) from 4.20250312.0 to 4.20250321.0.
- [Release notes](https://github.com/cloudflare/workerd/releases)
- [Changelog](https://github.com/cloudflare/workerd/blob/main/Dockerfile.release)
- [Commits](https://github.com/cloudflare/workerd/commits)

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

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

Author: dependabot[bot]

packages/service-utils/package.json

@@ -50,7 +50,7 @@
     "zod": "3.24.2"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "4.20250312.0",
+    "@cloudflare/workers-types": "4.20250321.0",
     "@types/node": "22.13.10",
     "typescript": "5.8.2",
     "vitest": "3.0.8"