Bump mongodb from 5.6.0 to 5.9.0 in /api

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) from 5.6.0 to 5.9.0.
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/v5.9.0/HISTORY.md)
- [Commits](mongodb/node-mongodb-native@v5.6.0...v5.9.0)

---
updated-dependencies:
- dependency-name: mongodb
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

api/package.json

@@ -21,7 +21,7 @@
     "cors": "^2.8.5",
     "express": "^4.18.2",
     "express-openapi": "^12.1.3",
-    "mongodb": "^5.6.0",
+    "mongodb": "^5.9.0",
     "node-fetch": "^3.3.2",
     "swagger-ui-express": "^4.6.3"
   },