fix: ruff deprecation warning

[wallberg]

Summary of changes

Fix ruff deprecation warning

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'
  - 'per-file-ignores' -> 'lint.per-file-ignores'

Checklist

• [x] Checked that there aren't other open pull requests for the same change.
• [x] Checked that all tests and type checking passes.
• [x] Considered granting push permissions to the PR branch, so maintainers can fix minor issues and keep your PR up to date.

[coveralls]

coverage: 91.03%. remained the same when pulling e9cbfb2043899e8386b7f096772b4ec048dd51a6 on wallberg:fix-ruff into 0ecc40009ae397c2798c0c08a2d751a1a9d2f8a7 on RDFLib:main.

[ashleysommer]

@wallberg Thanks for the fix. Unfortunately I didn't see this here, I already made this fix along with a bunch of other Ruff updates this afternoon.