Resolve AnnData FutureWarnings The dtype argument is deprecated

[Zethson]

Fixes #895

No more

site-packages/anndata/_core/anndata.py:401: FutureWarning: The dtype argument is deprecated and will be removed in late 2024.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.11%. Comparing base (62356a2) to head (fd54584).
Report is 11 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #896   +/-   ##
=======================================
  Coverage   92.11%   92.11%           
=======================================
  Files          48       48           
  Lines        7429     7429           
=======================================
  Hits         6843     6843           
  Misses        586      586           

Files with missing lines	Coverage Δ
src/spatialdata/_core/operations/aggregate.py	94.35% <ø> (ø)

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