Bump ruff from 0.15.5 to 0.15.6

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.5 to 0.15.6.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.5...0.15.6)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -59,7 +59,7 @@ optional-dependencies.dev = [
     "pytest==9.0.2",
     "pytest-cov==7.0.0",
     "pytest-regressions==2.10.0",
-    "ruff==0.15.5",
+    "ruff==0.15.6",
     "setuptools-scm==9.2.2",
     # We add shellcheck-py not only for shell scripts and shell code blocks,
     # but also because having it installed means that ``actionlint-py`` will