add Xenium 4.0.0 test dataset

[pryvkin10x]

Required by #312

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.06%. Comparing base (b543af7) to head (7cccdd1).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #326   +/-   ##
=======================================
  Coverage   49.06%   49.06%           
=======================================
  Files          26       26           
  Lines        2686     2686           
=======================================
  Hits         1318     1318           
  Misses       1368     1368           

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[LucaMarconato]

Thanks! I will regenerate the artifacts.