docs: fix broken star history chart in README

[Dessalines39394]

The Star History charts in both the English and Chinese READMEs are currently broken because the upstream image endpoint no longer renders under GitHub's stargazer API restrictions. This change points the charts to a working alternative so the star history is displayed correctly again.

Summary by CodeRabbit

• Documentation
  • Updated Star History chart links in the English and Chinese README files.
  • Charts now use the current Star History domain for improved access.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: e6c709c3-e9a7-4f79-b4bf-71a176dc434b

📥 Commits

Reviewing files that changed from the base of the PR and between 71f8b87 and 7e0b394.

📒 Files selected for processing (2)

• README.md
• README_CN.md

Included review availability: Your plan includes up to 8 reviews per rolling hour; 7 remain after this review.

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📝 Walkthrough

Walkthrough

The English and Chinese README files now use star-history.dera.page for the Star History chart image and destination link.

Changes

Star History links

Layer / File(s)	Summary
Update README Star History links README.md, README_CN.md	The Star History chart image and destination link now use star-history.dera.page.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 7e0b3

This localized documentation change updates the star history chart references in the English and Chinese READMEs; no actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the fix to the broken Star History chart in the README files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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