chore(deps): update ruff requirement from ==0.15.* to ==0.16.*

Updates the requirements on [ruff](https://github.com/astral-sh/ruff) to permit the latest version.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.0...0.16.2)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.16.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-testing.txt

@@ -4,7 +4,7 @@ mypy == 2.*
 pytest == 9.*
 pytest-cov == 7.*
 pytest-xdist == 3.*
-ruff == 0.15.*
+ruff == 0.16.*
 twine == 7.*
 types-pyyaml == 6.*
 # for integ tests