fix: fix special._bessel not working

[34j]

Description of change

Pull-Request Checklist

• Code is up-to-date with the main branch
• This pull request follows the contributing guidelines.
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions outlined in the conventional commit spec, such as "fix(api): prevent racing of requests".

• If pre-commit.ci is failing, try pre-commit run -a for further information.
• If CI / test is failing, try uv run pytest for further information.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.23%. Comparing base (231b508) to head (24bda3b).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
+ Coverage   64.07%   65.23%   +1.16%     
==========================================
  Files          12       12              
  Lines         604      607       +3     
  Branches      102      103       +1     
==========================================
+ Hits          387      396       +9     
+ Misses        197      189       -8     
- Partials       20       22       +2     

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