fix(sidebar): Use blue alpha badge on Home

[charlesvien]

Problem

Alpha badges in the sidebar are blue (info variant) but the Home item's Alpha badge rendered yellow (warning), clashing with the other Alpha badges and matching the Beta badge instead.

Changes

Switched the Home item's Alpha badge from variant="warning" to variant="info" so it renders blue like the other Alpha badges. Beta stays yellow.

How did you test this?

Ran Biome and pnpm --filter @posthog/ui typecheck on the change.

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

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[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit f946560.}

[github-actions]

Trivial cosmetic change swapping a badge variant from warning to info. No logic, no risk.

[greptile-apps]

_{Reviews (1): Last reviewed commit: "make home alpha badge blue" | Re-trigger Greptile}