DOC: Fix doc build

[larsoner]

Closes #1090

[codecov]

Codecov Report

Merging #1091 (5f2b588) into main (46b0a53) will decrease coverage by 0.33%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1091      +/-   ##
==========================================
- Coverage   95.20%   94.87%   -0.34%     
==========================================
  Files          24       24              
  Lines        3860     3860              
==========================================
- Hits         3675     3662      -13     
- Misses        185      198      +13     

Impacted Files	Coverage Δ
mne_bids/read.py	94.17% <0.00%> (-1.87%)	⬇️
mne_bids/write.py	96.69% <0.00%> (-0.51%)	⬇️

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[hoechenberger]

Thanks @larsoner!