Bump ruff from 0.2.0 to 0.2.1

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.2.0...v0.2.1)

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

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

requirements-dev.txt

@@ -1,5 +1,5 @@
 # lint & format
-ruff==0.2.0
+ruff==0.2.1
 typos==1.18.1
 
 # unittests