Bump Plotly version in docs

[tpvasconcelos]

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📚 Documentation preview 📚: https://ridgeplot--317.org.readthedocs.build/en/317/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (62bb044) to head (3a68f9d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #317   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           18        18           
  Lines          649       649           
  Branches        78        78           
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  Hits           649       649           

Flag	Coverage Δ
combined-src	99.84% <ø> (ø)

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