🎨 Palette: Fix heading hierarchy in Latest Update card

[NickJLange]

💡 What: Changed the Latest Post title heading from <h3> to <h4> in the LatestPost card inside src/components/HomepageContent/index.js.
🎯 Why: To fix the heading hierarchy for screen reader accessibility, as the parent container already uses an <h3> heading (<h3>Latest Update</h3>). Properly nesting headings allows screen-reader users to navigate the document structure logically.
📸 Before/After: N/A (non-visual structural change; visual presentation remains consistent within the Docusaurus styling system).
♿ Accessibility: Fixes a screen reader heading level violation by ensuring proper heading incrementation.

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PR created automatically by Jules for task 14921173149292404428 started by @NickJLange

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Summary by cubic

Fix heading hierarchy in the Latest Update card by changing the Latest Post title from

to

so it nests under the existing

. Improves screen reader navigation; no visual changes.

^{Written for commit 508b2e0. Summary will update on new commits.}

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[cubic-dev-ai]

No issues found across 1 file