requirement: bump ruff from 0.6.8 to 0.6.9

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.6.8 to 0.6.9.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.6.8...0.6.9)

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

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

requirements/test.txt

@@ -4,7 +4,7 @@ django-environ==0.11.2
 django-querycount==0.8.3
 djhtml==3.0.6
 freezegun==1.5.1
-ruff==0.6.8
+ruff==0.6.9
 pytest==8.3.3
 pytest-django==4.9.0
 sqlfluff==3.1.1