build(deps-dev): bump ruff from 0.5.5 to 0.5.6 in /tests/ocpp-server (#1121)

build(deps-dev): bump ruff from 0.5.5 to 0.5.6 in /tests/ocpp-server (#1121)

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.5.5 to 0.5.6.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](https://github.com/astral-sh/ruff/compare/0.5.5...0.5.6)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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