build(deps): bump mongoose from 6.1.4 to 6.11.3 in /server

Bumps [mongoose](https://github.com/Automattic/mongoose) from 6.1.4 to 6.11.3.
- [Release notes](https://github.com/Automattic/mongoose/releases)
- [Changelog](https://github.com/Automattic/mongoose/blob/master/CHANGELOG.md)
- [Commits](Automattic/mongoose@6.1.4...6.11.3)

---
updated-dependencies:
- dependency-name: mongoose
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>