fix canonical ref

[drammock]

PR Description

closes #1332

Merge checklist

Maintainer, please confirm the following before merging.
If applicable:

• All comments are resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• New contributors have been added to CITATION.cff
• PR description includes phrase "closes <#issue-number>"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.45%. Comparing base (ea5a6a7) to head (e4db95e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1333      +/-   ##
==========================================
- Coverage   97.47%   97.45%   -0.03%     
==========================================
  Files          40       40              
  Lines        8876     8876              
==========================================
- Hits         8652     8650       -2     
- Misses        224      226       +2     

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[drammock]

@sappelhoff only CI failure is BIDS-Validator app failing to install (clearly unrelated).

I checked randomly this page: https://output.circle-artifacts.com/output/job/6ca7c669-2237-4da5-867e-a97aa9561bb1/artifacts/0/dev/generated/mne_bids.write_raw_bids.html

and in the header I see

<link rel="canonical" href="https://mne.tools/mne-bids/stable/generated/mne_bids.write_raw_bids.html">

(which is correct)

[sappelhoff]

Thanks a lot @drammock!