Bump jupyter-server from 2.14.0 to 2.18.0

Bumps [jupyter-server](https://github.com/jupyter-server/jupyter_server) from 2.14.0 to 2.18.0.
- [Release notes](https://github.com/jupyter-server/jupyter_server/releases)
- [Changelog](https://github.com/jupyter-server/jupyter_server/blob/main/CHANGELOG.md)
- [Commits](jupyter-server/jupyter_server@v2.14.0...v2.18.0)

---
updated-dependencies:
- dependency-name: jupyter-server
  dependency-version: 2.18.0
  dependency-type: indirect
...

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

Author: dependabot[bot]