Bump slack-notifier from 2.3.2 to 2.4.0
Bump slack-notifier from 2.3.2 to 2.4.0

Bumps [slack-notifier](https://github.com/stevenosloan/slack-notifier) from 2.3.2 to 2.4.0.
- [Release notes](https://github.com/stevenosloan/slack-notifier/releases)
- [Changelog](https://github.com/slack-notifier/slack-notifier/blob/main/changelog.md)
- [Commits](https://github.com/stevenosloan/slack-notifier/compare/2.3.2...2.4.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
indentlabs/notebook,indentlabs/notebook,indentlabs/notebook