Precise ORTModel documentation (#1268)
* fix doc ortmodel
* style
* Update docs/source/exporters/onnx/usage_guides/export_a_model.mdx
Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>
* Update optimum/onnxruntime/modeling_ort.py
Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>
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Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>
