FIX / Docs: Minor changes in quantization docs (#30985)
* Change in quantization docs
* Update overview.md
* Update docs/source/en/quantization/overview.md
Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com>
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Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com>