fix: Adding datetime fix for h5files

[pesap]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.91%. Comparing base (b93efad) to head (b86a32e).

Files with missing lines	Patch %	Lines
src/r2x/upgrader/helpers.py	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #174      +/-   ##
==========================================
+ Coverage   82.87%   82.91%   +0.04%     
==========================================
  Files          42       42              
  Lines        4431     4436       +5     
==========================================
+ Hits         3672     3678       +6     
+ Misses        759      758       -1     

Files with missing lines	Coverage Δ
src/r2x/utils.py	59.80% <ø> (ø)
src/r2x/upgrader/helpers.py	92.53% <83.33%> (+2.21%)	⬆️

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