Fix use of pretrained version in validate

[xadupre]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 69.56522% with 7 lines in your changes missing coverage. Please review.

Project coverage is 77.17%. Comparing base (205b288) to head (88fe0ad).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
onnx_diagnostic/tasks/image_text_to_text.py	50.00%	3 Missing ⚠️
onnx_diagnostic/torch_models/hghub/hub_api.py	71.42%	2 Missing ⚠️
onnx_diagnostic/torch_models/hghub/model_inputs.py	75.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #158      +/-   ##
==========================================
- Coverage   77.18%   77.17%   -0.01%     
==========================================
  Files         108      108              
  Lines       12189    12202      +13     
==========================================
+ Hits         9408     9417       +9     
- Misses       2781     2785       +4     

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