Bump orchestra/testbench from 10.4.0 to 10.6.0

Bumps [orchestra/testbench](https://github.com/orchestral/testbench) from 10.4.0 to 10.6.0.
- [Release notes](https://github.com/orchestral/testbench/releases)
- [Changelog](https://github.com/orchestral/testbench/blob/10.x/CHANGELOG-10.x.md)
- [Commits](orchestral/testbench@v10.4.0...v10.6.0)

---
updated-dependencies:
- dependency-name: orchestra/testbench
  dependency-version: 10.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]