Update ruff requirement from 0.6.7 to 0.6.8

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@0.6.7...0.6.8)

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

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

pyproject.toml

@@ -36,7 +36,7 @@ mypy = "^1.11.1"
 pyright = "1.1.382"
 
 [tool.poetry.group.ruff.dependencies]
-ruff = "0.6.7"
+ruff = "0.6.8"
 
 [tool.poetry.group.tests.dependencies]
 coverage = { extras = ["toml"], version = "^7.4.1" }