chore(deps): update ruff requirement from ==0.7.* to ==0.8.* (#139)

Updates the requirements on [ruff](https://github.com/astral-sh/ruff) to permit the latest version.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.7.0...0.8.0)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:production
...

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

requirements-testing.txt

@@ -4,6 +4,6 @@ mypy == 1.*
 pytest == 8.*
 pytest-cov == 6.*
 pytest-xdist == 3.*
-ruff == 0.7.*
+ruff == 0.8.*
 types-pyyaml == 6.*
 twine == 5.*