Bump jupyter-server from 1.13.5 to 1.15.4

Bumps [jupyter-server](https://github.com/jupyter/jupyter_server) from 1.13.5 to 1.15.4.
- [Release notes](https://github.com/jupyter/jupyter_server/releases)
- [Changelog](https://github.com/jupyter-server/jupyter_server/blob/main/CHANGELOG.md)
- [Commits](jupyter-server/jupyter_server@v1.13.5...v1.15.4)

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

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