Fix `max_steps` documentation regarding the end-of-training condition (#27624)
* fix max_steps doc
* Update src/transformers/training_args.py [ci skip]
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>
* propagate suggested change
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Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>