Bump carbon-black-cloud-sdk in /docker/carbon-black-cloud

Bumps [carbon-black-cloud-sdk](https://github.com/carbonblack/carbon-black-cloud-sdk-python) from 1.5.6 to 1.5.7.
- [Release notes](https://github.com/carbonblack/carbon-black-cloud-sdk-python/releases)
- [Changelog](https://github.com/carbonblack/carbon-black-cloud-sdk-python/blob/develop/docs/changelog.rst)
- [Commits](carbonblack/carbon-black-cloud-sdk-python@v1.5.6...v1.5.7)

---
updated-dependencies:
- dependency-name: carbon-black-cloud-sdk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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