Bump ipykernel from 6.4.1 to 6.4.2
Bump ipykernel from 6.4.1 to 6.4.2

Bumps [ipykernel](https://ipython.org) from 6.4.1 to 6.4.2.

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
proinsias/gilbert-shannon-reeds,proinsias/gilbert-shannon-reeds,proinsias/gilbert-shannon-reeds