docs: Fix failing doctest for almost-zero model weights

[sethaxen]

Checklist

• PR follows official PR format.
• The docs change is listed in the Documentation section of the changelog.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.32%. Comparing base (c27e0da) to head (4ef24a7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #97   +/-   ##
=======================================
  Coverage   97.32%   97.32%           
=======================================
  Files          16       16           
  Lines         936      936           
=======================================
  Hits          911      911           
  Misses         25       25           

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