docs: improve changelog prompt for brevity and readability

[Kitenite]

Summary

• Lead with 2-4 major features that get their own sections
• Group smaller improvements under a single "Improvements" heading
• Add bug fixes as a footnote section at the bottom
• Add content hierarchy table for clear PR categorization

Changes to prompt structure

PR Type	Treatment
New user-facing feature	Own section with heading
Significant improvement	Own section or grouped
Small enhancement	One line under "Improvements"
Bug fix	One-liner in footnote at bottom
Internal/refactor	Skip entirely

Test plan

• Run workflow manually and verify changelog format

Summary by CodeRabbit

Release Notes

No user-facing changes. This update contains internal improvements to development automation and documentation guidelines only.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The pull request updates the weekly automation guidance document to restructure PR categorization into explicit categories (Major Features, Improvements, Bug Fixes), refines prioritization workflow, enhances writing style guidelines, and adds a content hierarchy section for consistent PR presentation.

Changes

Cohort / File(s)	Summary
Documentation & Guidance Update \\.github/prompts/weekly-automation.md	Restructured PR categorization guidance with explicit categories; consolidated PR prioritization workflow; updated file creation naming conventions and slug usage; overhauled snippet templates with new headings and PRBadge URLs; expanded writing style rules with value-focused content; added Content hierarchy section; adjusted formatting rules for header images and bug-fix footnotes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A guidance refreshed, so clear and neat,
Categories sorted, a weekly treat,
Major features leap and shine so bright,
While bugs footnoted feel quite light,
Hierarchy guides us, all is right! ✨

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