fix: Update Product Hunt badge links

[bdougie]

Related to #288

Updates the Product Hunt badge links and images in the PHBadge.tsx and PHBadgeDark.tsx components to reflect the new product launch details.

• Changes the href attribute in both components to point to the new Product Hunt link for StarSearch.
• Updates the src attribute of the img tag in both components to use the new image sources for the light and dark themes, respectively.
• Adjusts the alt text in both components to accurately describe the new product as "StarSearch - Copilot, but for git history | Product Hunt".

---

For more details, open the Copilot Workspace session.

[netlify[bot]]

✅ Deploy Preview for opensauced-landing ready!

Name	Link
🔨 Latest commit	e36b7afd18e6fd815b3dff9d85e32a2cce36db94
🔍 Latest deploy log	https://app.netlify.com/sites/opensauced-landing/deploys/664f0edcd1b65c0008eb28a8
😎 Deploy Preview	https://deploy-preview-289--opensauced-landing.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 100 (no change from production) Accessibility: 91 (no change from production) Best Practices: 92 (no change from production) SEO: 83 (no change from production) PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify site configuration.