docs(i18n): Correct the descriptive text in the README_zh-hans.md

[lilin-1]

What does this PR do?

This PR corrects an incomplete Simplified Chinese description in the documentation by adding the missing term "函数库" (library). The change ensures consistency with the Traditional Chinese version and fixes grammatical/semantic ambiguities.

Background & Motivation

The original Simplified Chinese text was incomplete, lacking a clear object to clarify the subject of the description. The corresponding Traditional Chinese reference text (which serves as the consistency baseline) includes the term 為 Jax、PyTorch 以及 TensorFlow 打造的先進自然語言處理函式庫 (where "函式庫" = Traditional Chinese for "library").

Change Details

Text Type	Original (Incomplete)	Corrected (Complete)
Simplified Chinese	为 Jax、PyTorch 和 TensorFlow 打造的先进的自然语言处理	为 Jax、PyTorch 和 TensorFlow 打造的先进的自然语言处理函数库

Key Improvements

1. Cross-Chinese Variant Consistency: Aligns Simplified Chinese with Traditional Chinese by matching the core term "函数库" (Simplified) ↔ "函式庫" (Traditional), eliminating translation discrepancies.
2. Grammatical Completeness: Fixes the original sentence’s lack of an object (the original phrase "打造的先进的自然语言处理" failed to specify what is "built" for the frameworks).
3. Semantic Clarity: Explicitly confirms the subject is an NLP library (not vague "NLP technology"), fully aligning with the original description’s intent.

No dependencies are required for this change.

Fixes #N/A (No corresponding issue; this is a direct documentation accuracy improvement)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline, Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link to it if that's the case.
  Note: Not applicable—this change addresses a direct documentation inconsistency found during review, with no prior discussion needed.
• Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings (https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
  Update made: Modified the Simplified Chinese README’s descriptive text to include "函数库".
• Did you write any new necessary tests?
  Note: Not applicable—this is a documentation-only change that does not impact code logic or functionality.

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag members/contributors who may be interested in your PR.

@stevhliu
(Per the template guidelines, tagged the documentation-focused reviewer for Chinese docs accuracy checks.)

[stevhliu]

Thanks for the fix!

[HuggingFaceDocBuilderDev]

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