Bump ipykernel from 6.25.0 to 6.25.2

Bumps [ipykernel](https://github.com/ipython/ipykernel) from 6.25.0 to 6.25.2.
- [Release notes](https://github.com/ipython/ipykernel/releases)
- [Changelog](https://github.com/ipython/ipykernel/blob/main/CHANGELOG.md)
- [Commits](ipython/ipykernel@v6.25.0...v6.25.2)

---
updated-dependencies:
- dependency-name: ipykernel
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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