chore(deps-dev): bump black in /test-engineering/contract-tests/client

Bumps [black](https://github.com/psf/black) from 22.6.0 to 22.8.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@22.6.0...22.8.0)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

test-engineering/contract-tests/client/dev-requirements.txt

@@ -4,7 +4,7 @@
 #
 #    pip-compile dev-requirements.in
 #
-black==22.6.0
+black==22.8.0
     # via -r dev-requirements.in
 click==8.1.3
     # via black