chore: Update Tauri and Vercel submodules to latest commits

Updated both Tauri (desktop framework) and Vercel (deployment configuration) submodules to their respective latest commits. This ensures compatibility with recent improvements and bug fixes from upstream dependencies.

- Tauri submodule advanced from 78d69f6 to 1cdd73a
- Vercel submodule updated from 67c5c0e to d5460cf

These updates help leverage performance optimizations, security patches, and new features introduced in the underlying frameworks while maintaining project stability through tested versions.

Author: Nikola Hristov