Bump express from 4.21.1 to 4.21.2 in /tools (#3281)

Bumps [express](https://github.com/expressjs/express) from 4.21.1 to 4.21.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.2/History.md)
- [Commits](expressjs/express@4.21.1...4.21.2)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tools/package.json

@@ -23,7 +23,7 @@
     "ajv": "^6.12.6",
     "eslint": "^8.57.1",
     "eslint-plugin-header": "^3.1.1",
-    "express": "^4.21.1",
+    "express": "^4.21.2",
     "jest": "^29.7.0",
     "ts-jest": "^29.2.5",
     "ts-node": "^10.9.2",