fix: snirf length units (#10613)
fix: snirf length units (#10613)


kingjr/mne-python,drammock/mne-python,larsoner/mne-python,Teekuningas/mne-python,olafhauk/mne-python,pravsripad/mne-python,drammock/mne-python,Teekuningas/mne-python,larsoner/mne-python,mne-tools/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,olafhauk/mne-python,larsoner/mne-python,drammock/mne-python,kingjr/mne-python,kingjr/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,pravsripad/mne-python,wmvanvliet/mne-python,pravsripad/mne-python,olafhauk/mne-python,Teekuningas/mne-python