Bump ruff from 0.12.7 to 0.12.9 in /requirements

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.12.7 to 0.12.9.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.12.7...0.12.9)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.12.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements/test.txt

@@ -3,5 +3,5 @@ packaging==25.0
 pytest==8.4.1
 pytest-xdist==3.8.0
 pytest-cov==6.2.1
-ruff==0.12.7
+ruff==0.12.9
 setuptools==80.9.0