fix cosmx load error

[JarningGau]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.30%. Comparing base (7cccdd1) to head (9f9b716).
⚠️ Report is 87 commits behind head on main.

Files with missing lines	Patch %	Lines
src/spatialdata_io/readers/cosmx.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #331      +/-   ##
==========================================
+ Coverage   49.06%   55.30%   +6.23%     
==========================================
  Files          26       26              
  Lines        2686     2846     +160     
==========================================
+ Hits         1318     1574     +256     
+ Misses       1368     1272      -96     

Files with missing lines	Coverage Δ
src/spatialdata_io/readers/cosmx.py	17.69% <0.00%> (ø)

... and 7 files with indirect coverage changes

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[LucaMarconato]

Thank @JarningGau. @quentinblampey and @timtreis are working on a new version of the reader, I'll loop them in.