update installer links to 1.2.1 (#11272)
update installer links to 1.2.1 (#11272)


wmvanvliet/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,mne-tools/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,Teekuningas/mne-python,Teekuningas/mne-python,Teekuningas/mne-python