build(deps-dev): bump @cloudflare/workers-types in /mcp

Bumps [@cloudflare/workers-types](https://github.com/cloudflare/workerd) from 5.20260814.1 to 5.20260904.1.
- [Release notes](https://github.com/cloudflare/workerd/releases)
- [Changelog](https://github.com/cloudflare/workerd/blob/main/RELEASE.md)
- [Commits](https://github.com/cloudflare/workerd/commits)

---
updated-dependencies:
- dependency-name: "@cloudflare/workers-types"
  dependency-version: 5.20260904.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

mcp/package-lock.json

@@ -14,7 +14,7 @@
     "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "^5.20260814.1",
+    "@cloudflare/workers-types": "^5.20260904.1",
     "typescript": "^7.0.2",
     "wrangler": "^4.123.0",
     "yaml": "^2.6.0"