Small fixes for ModelBuilder

[xadupre]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.

Project coverage is 74.89%. Comparing base (77a6db1) to head (dd51585).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
onnx_diagnostic/helpers/model_builder_helper.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #113   +/-   ##
=======================================
  Coverage   74.88%   74.89%           
=======================================
  Files          89       89           
  Lines        9564     9575   +11     
=======================================
+ Hits         7162     7171    +9     
- Misses       2402     2404    +2     

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