Bump ruff from 0.6.7 to 0.6.8

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.6.7 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@0.6.7...0.6.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -33,7 +33,7 @@ GitHub = "https://github.com/breezy-team/fastbencode"
 [project.optional-dependencies]
 cext = ["cython>=0.29"]
 dev = [
-    "ruff==0.6.7"
+    "ruff==0.6.8"
 ]
 
 [tool.setuptools]