build(deps): bump express from 4.21.0 to 4.21.2 in /api

Bumps [express](https://github.com/expressjs/express) from 4.21.0 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@4.21.0...4.21.2)

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

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

api/package.json

@@ -19,7 +19,7 @@
     "body-parser": "^1.20.2",
     "connect-history-api-fallback": "^2.0.0",
     "cors": "^2.8.5",
-    "express": "^4.21.0",
+    "express": "^4.21.2",
     "express-openapi": "^12.1.3",
     "mongodb": "^5.9.2",
     "node-fetch": "^3.3.2",