update<submodules>: update uvkcp and uvudt submodules with latest improvements

- uvkcp: Non-blocking UDP socket implementation for libuv integration
- uvudt: Compilation fixes and type safety improvements

Includes architectural improvements and bug fixes for both protocol
extensions, ensuring clean compilation and proper libuv integration.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: 2 people