Bump ruff to 0.2.0

[AlexWaygood]

Fix this deprecation warning when running ruff on the repository directly:

warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `pyproject.toml`:
  - 'ignore' -> 'lint.ignore'
  - 'select' -> 'lint.select'
  - 'unfixable' -> 'lint.unfixable'
  - 'isort' -> 'lint.isort'

Note that you don't see the deprecation warnings if you run ruff via pre-commit (only if you run ruff directly, e.g. via ruff .), since pre-commit swallows all output from a tool if the tool exits with code 0.

[github-actions]

According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅