ci: check toml in ci run

[spolisar]

Check toml-sort instead of sorting the file, so unsorted files are displayed in ci run.

Example output of a toml sort check failure:

ruff.....................................................................Passed
ruff-format..............................................................Passed
mypy.....................................................................Passed
toml-sort................................................................Failed
- hook id: toml-sort
- exit code: 1

1 check failure(s):
  - pyproject.toml