Bump ruff from 0.4.7 to 0.6.8

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.4.7 to 0.6.8.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.4.7...0.6.8)

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

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

setup.py

@@ -75,5 +75,5 @@ def get_version():
         "tabulate==0.9.0",
         "wheel==0.44.0",
     ],
-    extras_require={"dev": ["ruff==0.4.7", "pre-commit==3.8.0", "pytest==8.3.2"]},
+    extras_require={"dev": ["ruff==0.6.8", "pre-commit==3.8.0", "pytest==8.3.2"]},
 )