[nfc] fix typo examples and docs

[digger-yu]

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📝 What does this PR do?

fix typo examples and docs
detail info
modified: docs/source/en/advanced_tutorials/parallelize_your_training_
like_Megatron.md
modified: docs/source/zh-Hans/advanced_tutorials/parallelize_your_trai
ning_like_Megatron.md
modified: examples/images/dreambooth/README.md
modified: examples/language/bert/README.md
modified: examples/language/gpt/gemini/train_gpt_demo.py
modified: examples/language/gpt/titans/model/embed.py
modified: examples/language/opt/opt_train_demo.py
modified: examples/language/palm/train.py

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[FrankLeeeee]

LGTM!