build(deps-dev): bump ruff in /tests/ocpp-server in the regular group (#1466)

build(deps-dev): bump ruff in /tests/ocpp-server in the regular group (#1466)

Bumps the regular group in /tests/ocpp-server with 1 update: [ruff](https://github.com/astral-sh/ruff).

Updates `ruff` from 0.12.2 to 0.12.3
- [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/0.12.2...0.12.3)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.12.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: regular
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>