🎨 Palette: Update heading level for Latest Update card

[NickJLange]

💡 What:

Updated the <h3> tag in the LatestPost card's header to an <h4>. Also added an entry to .Jules/palette.md noting the importance of semantic heading hierarchies in reusable components.

🎯 Why:

The "Latest Update" section already uses an <h3> heading. Having the nested card's title also be an <h3> breaks the logical document outline and semantic navigation structure for screen reader users, who rely on heading levels to understand context.

📸 Before/After:

The visual presentation has not changed because the class-based styling handles the appearance. However, the raw HTML now correctly nests the post title <h4> under the section title <h3>.

♿ Accessibility:

Improved semantic HTML hierarchy for screen reader navigation by ensuring headings increment logically.

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PR created automatically by Jules for task 17558020667341023800 started by @NickJLange

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Summary by cubic

Updated the nested post title in the homepage "Latest Update" card from <h3> to <h4> to keep a correct heading hierarchy under the section’s <h3>. Improves screen reader navigation with no visual changes, and adds a note on semantic headings to .Jules/palette.md.

^{Written for commit ad3c200. Summary will update on new commits.}

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[cubic-dev-ai]

No issues found across 2 files