FIX: replace mne.Raw with mne.io.Raw

[scott-huberty]

mne.io.Raw not mne.Raw.

Mostly used in docstring but caught one instance in the actual code (which would throw an error).

@christian-oreilly do you want a test?

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.27%. Comparing base (5f4df91) to head (f56a5df).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pylossless/pipeline.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #212      +/-   ##
==========================================
+ Coverage   80.81%   83.27%   +2.46%     
==========================================
  Files          22       26       +4     
  Lines        1282     1698     +416     
==========================================
+ Hits         1036     1414     +378     
- Misses        246      284      +38     

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[christian-oreilly]

Not sure it is worth adding a test just to hit a single line checking a type. I think this is definitely a net + and it does not hurt the coverage (just did not improve it). I would merge regardless of the codecov complaint!