build(deps-dev): 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

@@ -78,7 +78,7 @@ dev = [
     "pytest-md==0.2.0",
     "pytest-mock==3.15.1",
     "python-gettext==5.0",
-    "ruff==0.15.5",
+    "ruff==0.15.6",
     "types-requests==2.32.4.20260107",
     "ty==0.0.23",
 ]