Bump ruff from 0.8.0 to 0.8.1

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.8.0...0.8.1)

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

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

pyproject.toml

@@ -43,7 +43,7 @@ Documentation = "https://piqtree2.readthedocs.io"
 [project.optional-dependencies]
 dev = ["cibuildwheel", "pybind11", "scriv", "piqtree2[test]", "piqtree2[lint]", "piqtree2[typing]"]
 test = ["pytest", "pytest-cov", "nox"]
-lint = ["ruff==0.8.0"]
+lint = ["ruff==0.8.1"]
 typing = ["mypy==1.13.0", "piqtree2[stubs]", "piqtree2[test]"]
 stubs = ["types-PyYAML", "types-requests"]
 extra = ["cogent3[extra]"]