Update with-python.md with CUDA 12.X instructions (#20442)
### Description
with-python.md does not currently include installation instructions for
CUDA 12.X, so I added the instructions from
https://onnxruntime.ai/docs/execution-providers/CUDA-ExecutionProvider.html#requirements.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
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