🎨 Palette: Fix heading hierarchy in nested UI cards

[NickJLange]

💡 What: Changed the <h3> wrapping the post title inside the "Latest Update" card to an <h4> in src/components/HomepageContent/index.js.
🎯 Why: To improve semantic heading hierarchy. The "Latest Update" section itself is an <h3>. Nesting another <h3> immediately inside it for the card title disrupts the logical document outline, making it confusing for screen reader users navigating by headings.
♿ Accessibility: This directly improves accessibility by ensuring heading levels correctly increment, allowing screen readers to accurately represent the relationship between the section and its contents.
📝 Journal Entry: A new critical learning regarding heading hierarchy in nested UI components was added to .Jules/palette.md.

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PR created automatically by Jules for task 14610081192161817067 started by @NickJLange

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Summary by cubic

Fixed the heading hierarchy in the “Latest Update” card by changing the post title from h3 to h4. This keeps the outline under the section’s h3 and improves screen reader navigation.

^{Written for commit 6e26451. Summary will update on new commits.}

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[cubic-dev-ai]

No issues found across 2 files