Backport PR #3924 on branch 1.12.x (fix: removed unecessary warning when a file name comprises multiple dots)

[meeseeksmachine]

Backport PR #3924: fix: removed unecessary warning when a file name comprises multiple dots

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 77.22%. Comparing base (58d8503) to head (2f1a249).
⚠️ Report is 1 commits behind head on 1.12.x.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/scanpy/readwrite.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           1.12.x    #3972      +/-   ##
==========================================
- Coverage   77.79%   77.22%   -0.57%     
==========================================
  Files         117      117              
  Lines       12634    12634              
==========================================
- Hits         9829     9757      -72     
- Misses       2805     2877      +72     

Flag	Coverage Δ
hatch-test.low-vers	?
hatch-test.pre	77.22% <0.00%> (+15.22%)	⬆️

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Files with missing lines	Coverage Δ
src/scanpy/readwrite.py	77.30% <0.00%> (-1.19%)	⬇️

... and 8 files with indirect coverage changes