chore(deps): bump notebook from 7.1.2 to 7.2.1

Bumps [notebook](https://github.com/jupyter/notebook) from 7.1.2 to 7.2.1.
- [Release notes](https://github.com/jupyter/notebook/releases)
- [Changelog](https://github.com/jupyter/notebook/blob/@jupyter-notebook/[email protected]/CHANGELOG.md)
- [Commits](https://github.com/jupyter/notebook/compare/@jupyter-notebook/[email protected]...@jupyter-notebook/[email protected])

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

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