Update contributors

[sappelhoff]

@Kallemakela thank you so much. I think we still need to add you to https://github.com/mne-tools/mne-bids/blob/main/CITATION.cff See also https://github.com/mne-tools/mne-bids/blob/main/CONTRIBUTING.md#instructions-for-first-time-contributors

Originally posted by @sappelhoff in #1466 (comment)

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We also need to update the current changelog with additional authors who have contributed:

currently only listing myself under returning authors, but several others have committed (and helped). No rush with this, but important to keep track and do it before the next release.

[Kallemakela]

@sappelhoff no problem, happy to contribute. I did add myself to the authors list https://github.com/mne-tools/mne-bids/blob/main/CITATION.cff#L228

[sappelhoff]

Thanks @Kallemakela I missed this. 👏