ruff TOML updates

[drammock]

Should fix this, which appeared in #11776

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

https://github.com/mne-tools/mne-python/actions/runs/7811101140/job/21305620584?pr=12207

[drammock]

all green; ready for review/merge from my end

[larsoner]

Thanks @drammock !