Update ruff requirement from <0.5 to <0.6

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@v0.0.18...0.5.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -92,7 +92,7 @@ develop = [
   "mypy<1.11",
   "poethepoet<0.28",
   "pyproject-fmt<2.2",
-  "ruff<0.5",
+  "ruff<0.6",
   "types-docutils==0.20.0.3",
   "validate-pyproject<0.19",
 ]