Update distributed_inference.md to include a fuller example on distributed inference (#9152)
* Update distributed_inference.md
* Update docs/source/en/training/distributed_inference.md
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
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Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>