CI: Add missing changelog entry following CI failure

[Sidnioulz]

Manual testing

n/a

Summary by CodeRabbit

• Documentation
  • Changelog updated with version 10.4.3 release notes documenting enhancements across Addon-Docs, Core, React, and UI components.

[Copilot]

Pull request overview

Adds the missing 10.4.3 section to the top of the project changelog, which aligns with the PR’s goal of addressing a CI failure caused by an absent changelog entry.

Changes:

• Add a new ## 10.4.3 heading at the top of CHANGELOG.md.
• Populate the 10.4.3 section with the relevant release notes (linked PRs + acknowledgements).

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[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: 4365f4ee-2f1c-4bf4-95c5-914f835a00f6

📥 Commits

Reviewing files that changed from the base of the PR and between 01b3bc0 and 8e95ab1.

📒 Files selected for processing (1)

• CHANGELOG.md

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📝 Walkthrough

Walkthrough

CHANGELOG.md was updated by adding a new version 10.4.3 section at the top of the file. The entry includes four categorized release notes covering Addon-Docs, Core MDX sidebar tags, React subcomponents, and UI HMR scroll behavior, each with associated PR links and author acknowledgements.

Changes

Release Notes

Layer / File(s)	Summary
Version 10.4.3 release notes CHANGELOG.md	New version 10.4.3 changelog section documents fixes and features across four packages: Addon-Docs, Core (MDX sidebar tag behavior), React (subcomponents as properties), and UI (HMR re-render scroll reset prevention).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

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