Update ruff requirement from ~=0.8 to ~=0.9 (#117)

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@0.8.0...0.9.1)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
...

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requirements_dev.txt

@@ -3,7 +3,7 @@ mypy>=1.8.0
 pydantic>=2.9.2
 pre-commit>=3.6.1
 python-dotenv>=1.0.1
-ruff~=0.8
+ruff~=0.9
 mkdocs-material==9.5.49
 mkdocstrings[python]==0.27.0
 mashumaro>=3.13.1