build(deps): bump ruff from 0.15.20 to 0.16.0

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.20 to 0.16.0.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.20...0.16.0)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 pytest==9.1.1
-ruff==0.15.20
+ruff==0.16.0
 slack-bolt==1.30.0