docs: improve restart option heading

[chenjiahan]

Summary

This PR updates the restart option headings in the English and Chinese JavaScript API docs to use clearer descriptive wording. It also aligns the localized anchor IDs and updates all affected internal links.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 8934d5f5-265b-473a-ab56-409fece53687

📥 Commits

Reviewing files that changed from the base of the PR and between cba4a91 and 8c9fd42.

📒 Files selected for processing (6)

• website/docs/en/api/javascript-api/core.mdx
• website/docs/en/guide/configuration/rsbuild.mdx
• website/docs/en/shared/onRestart.mdx
• website/docs/zh/api/javascript-api/core.mdx
• website/docs/zh/guide/configuration/rsbuild.mdx
• website/docs/zh/shared/onRestart.mdx

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📝 Walkthrough

Walkthrough

Updated the restart documentation section headings in English and Chinese API references to use the restart-handling anchor. Synchronized links in the createRsbuild API, configuration guide, and onRestart documentation across both languages.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly reflects the doc change to rename the restart option heading and related anchors.
Description check	✅ Passed	The description matches the documented updates to restart headings, anchors, and internal links in English and Chinese docs.
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.

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[chatgpt-codex-connector]

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