build(deps-dev): bump mongodb from 6.8.1 to 6.9.0 (#779)

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) from 6.8.1 to 6.9.0.
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/main/HISTORY.md)
- [Commits](mongodb/node-mongodb-native@v6.8.1...v6.9.0)

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

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

package.json

@@ -41,7 +41,7 @@
     "eslint": "^8.57.1",
     "eslint-config-etherpad": "^4.0.4",
     "eslint-plugin-import": "^2.31.0",
-    "mongodb": "^6.8.1",
+    "mongodb": "^6.9.0",
     "mssql": "^11.0.1",
     "mysql2": "^3.11.3",
     "nano": "^10.1.4",