Bump approvaltests from 16.1.0 to 16.2.0 in /flowmachine

Bumps [approvaltests](https://github.com/approvals/ApprovalTests.Python) from 16.1.0 to 16.2.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Python/releases)
- [Commits](approvals/ApprovalTests.Python@v16.1.0...v16.2.0)

---
updated-dependencies:
- dependency-name: approvaltests
  dependency-version: 16.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]