Bump node-notifier and jest in /example

Removes [node-notifier](https://github.com/mikaelbr/node-notifier). It's no longer used after updating ancestor dependency [jest](https://github.com/facebook/jest/tree/HEAD/packages/jest). These dependencies need to be updated together.


Removes `node-notifier`

Updates `jest` from 25.5.4 to 29.3.1
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/commits/v29.3.1/packages/jest)

---
updated-dependencies:
- dependency-name: node-notifier
  dependency-type: indirect
- dependency-name: jest
  dependency-type: direct:development
...

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

Author: dependabot[bot]