coil_def.dat needs update

[github-actions]

Context

This issue is automatically created because coil_def.dat between Brainstorm and MNE-Python have diverged.

Verify differences

1. MNE-Python version: https://github.com/mne-tools/mne-python/blob/main/mne/data/coil_def.dat.
2. Brainstorm version: https://github.com/brainstorm-tools/brainstorm3/blob/master/toolbox/io/private/coil_def.dat.
3. Manually verify the changes and if needed, update ````coil_def.dat``` and create a pull request.