Bump ruff in /requirements in the python-requirements group (#576)

Bumps the python-requirements group in /requirements with 1 update: [ruff](https://github.com/astral-sh/ruff).


Updates `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
  dependency-group: python-requirements
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/style.txt

@@ -1,3 +1,3 @@
 # Code formatter + Code quality + Code linter
 # ------------------------------------------------------------------------------
-ruff==0.6.8  # https://github.com/astral-sh/ruff
+ruff==0.6.9  # https://github.com/astral-sh/ruff