fix: Return correct python package version

[coastalwhite]

Fixes #23940.

[codecov]

Codecov Report

❌ Patch coverage is 7.69231% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.41%. Comparing base (b512da3) to head (42f76a3).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
py-polars/src/lib.rs	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23951      +/-   ##
==========================================
- Coverage   81.44%   81.41%   -0.03%     
==========================================
  Files        1672     1673       +1     
  Lines      225183   225195      +12     
  Branches     2903     2903              
==========================================
- Hits       183394   183344      -50     
- Misses      41064    41126      +62     
  Partials      725      725              

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