Bump ruff from 0.15.7 to 0.15.8

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.7 to 0.15.8.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.7...0.15.8)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -81,7 +81,7 @@ optional-dependencies.dev = [
     "pytest-xdist==3.8.0",
     "pyyaml==6.0.3",
     "requests-mock-flask==2026.2.16",
-    "ruff==0.15.7",
+    "ruff==0.15.8",
     # We add shellcheck-py not only for shell scripts and shell code blocks,
     # but also because having it installed means that ``actionlint-py`` will
     # use it to lint shell commands in GitHub workflow files.