DOC: Add description about ´coord_frame´ parameter in mne.channels.make_dig_montage (#9146)
DOC: Add description about ´coord_frame´ parameter in mne.channels.make_dig_montage (#9146)

* Add description about ´coord_frame´ parameter in mne.channels.make_dig_montage.

* Update mne/channels/montage.py

Co-authored-by: Daniel McCloy <2591e5f46f28d303f9dc027d475a5c60d8dea17a@mccloy.info>

Co-authored-by: Daniel McCloy <2591e5f46f28d303f9dc027d475a5c60d8dea17a@mccloy.info>
bloyl/mne-python,drammock/mne-python,mne-tools/mne-python,olafhauk/mne-python,pravsripad/mne-python,kambysese/mne-python,kingjr/mne-python,wmvanvliet/mne-python,Teekuningas/mne-python,Eric89GXL/mne-python,larsoner/mne-python,wmvanvliet/mne-python,larsoner/mne-python,Teekuningas/mne-python,olafhauk/mne-python,drammock/mne-python,rkmaddox/mne-python,Teekuningas/mne-python,bloyl/mne-python,pravsripad/mne-python,larsoner/mne-python,drammock/mne-python,Eric89GXL/mne-python,kambysese/mne-python,olafhauk/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,mne-tools/mne-python,kingjr/mne-python,pravsripad/mne-python,rkmaddox/mne-python,kingjr/mne-python