Update og description

[JayJay1024]

PR-Codex overview

This PR updates the og:description meta tags in two HTML files to reflect the rebranding of HelixBridge to Helixbox and to clarify the new focus of the platform.

Detailed summary

• In apps/helix/index.html, updated og:description from "Secure, fast, and low-cost cross-chain crypto transfers." to "HelixBridge has rebranded to Helixbox."
• In apps/helixbox-home/index.html, updated og:description to emphasize Helixbox's focus on multi-chain liquidity provision and a superior user experience.

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