Mnist.Readme - Onnxruntime

js/react_native/e2e/src/mnist.onnx is onnxruntime/test/testdata/mnist.onnx updated to opset 15.

bash

cd <repo root>/js
python -m onnxruntime.tools.update_onnx_opset --opset 15 ../onnxruntime/test/testdata/mnist.onnx ./react_native/e2e/src/mnist.onnx

js/react_native/e2e/src/mnist.ort and js/react_native/e2e/android/app/src/main/assets/mnist.ort are converted from js/react_native/e2e/src/mnist.onnx.

bash

cd <repo root>/js
python -m onnxruntime.tools.convert_onnx_models_to_ort --optimization_style=Fixed --output_dir ./react_native/e2e/android/app/src/main/assets ./react_native/e2e/src/mnist.onnx
python -m onnxruntime.tools.convert_onnx_models_to_ort --optimization_style=Fixed --output_dir ./react_native/e2e/src ./react_native/e2e/src/mnist.onnx