Fix link in jupyter-widgets-the-good-parts.mdx

[dvdkouril]

Randomly found this ./ link in docs. On localhost that redirects correctly, but when deployed, the resulting link url is https://anywidget.dev/en/jupyter-widgets-the-good-parts/community which 404s.

Seems to be the only occurence.

[changeset-bot]

⚠️ No Changeset found

Latest commit: dedc686

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.75%. Comparing base (12ca2f8) to head (dedc686).
Report is 223 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #688      +/-   ##
==========================================
- Coverage   98.45%   96.75%   -1.70%     
==========================================
  Files           8        9       +1     
  Lines         452      555     +103     
==========================================
+ Hits          445      537      +92     
- Misses          7       18      +11     

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[manzt]

Thanks!