update copyright

Currently the license states: `Copyright (c) 2025 Scott Powell / rippleradios.com` which should be updated as the entire codebase does not belong to Scott anymore, it has been built upon by numerous contributors.

Should at least be:
```
Copyright (c) 2025-2026 Scott Powell / rippleradios.com
Copyright (c) 2025-2026 MeshCore Contributors
```