Bump guard from 2.15.0 to 2.15.1
Bump guard from 2.15.0 to 2.15.1

Bumps [guard](https://github.com/guard/guard) from 2.15.0 to 2.15.1.
- [Release notes](https://github.com/guard/guard/releases)
- [Commits](https://github.com/guard/guard/compare/v2.15.0...v2.15.1)

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