chore(deps): bump ruff from 0.6.8 to 0.6.9 in /requirements/lintrunner

Bumps [ruff](https://github.com/astral-sh/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
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/lintrunner/requirements.txt

@@ -1,7 +1,7 @@
 # This file is auto updated by dependabot
 lintrunner-adapters>=0.8.0
 # RUFF, RUFF-FIX
-ruff==0.6.8
+ruff==0.6.9
 # MYPY
 mypy==1.10.1
 types-PyYAML==6.0.12.20240808