py-ipykernel: updated to 6.29.1

6.29.1

Bugs fixed

- fix: on exception, return a 0, so that the "sum" still computes
- Fix handling of "silent" in execute request

Maintenance and upkeep improvements

- chore: update pre-commit hooks
- Do git ignore of /node_modules/.cache
- Bump the actions group with 1 update

(adam)