Bump ruff from 0.15.19 to 0.15.20 (#6981)

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.19 to 0.15.20.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](https://github.com/astral-sh/ruff/compare/0.15.19...0.15.20)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements_tests.txt

@@ -9,7 +9,7 @@ pytest-cov==7.1.0
 pytest-timeout==2.4.0
 pytest-xdist==3.8.0
 pytest==9.1.1
-ruff==0.15.19
+ruff==0.15.20
 time-machine==3.2.0
 types-pyyaml==6.0.12.20260518
 urllib3==2.7.0