build(deps): bump notebook from 6.5.2 to 7.2.1

Bumps [notebook](https://github.com/jupyter/notebook) from 6.5.2 to 7.2.1.
- [Release notes](https://github.com/jupyter/notebook/releases)
- [Changelog](https://github.com/jupyter/notebook/blob/@jupyter-notebook/tree@7.2.1/CHANGELOG.md)
- [Commits](https://github.com/jupyter/notebook/compare/v6.5.2...@jupyter-notebook/tree@7.2.1)

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

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