build(deps): bump actions/checkout from 2 to 2.4.0

build(deps): bump actions/checkout from 2 to 2.4.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...ec3a7ce113134d7a93b817d10a8272cb61118579)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>