Bump ruff from 0.8.5 to 0.8.6 in /requirements (#1022)

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.8.5 to 0.8.6.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.8.5...0.8.6)

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

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

Author: dependabot[bot]

requirements/test.txt

@@ -2,4 +2,4 @@ packaging==24.2
 pytest==8.3.4
 pytest-xdist==3.6.1
 pytest-cov==6.0.0
-ruff==0.8.5
+ruff==0.8.6