build(deps-dev): 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:development
  update-type: version-update:semver-patch
...

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

Pipfile

@@ -20,7 +20,7 @@ types-setuptools = "==75.1.0.20240917"
 types-mock = "==5.1.0.20240425"
 types-redis = "==4.6.0.20240903"
 tbump = "==6.11.0"
-ruff = "==0.6.7"
+ruff = "==0.6.8"
 rstcheck = "==6.2.4"
 
 [requires]