flake: update inputs (#145)

Flake lock file updates:

• Updated input 'nixos-cosmic':
    'github:lilyinstarlight/nixos-cosmic/1531210f371ecf966ff67e87975f684553bdbbf7?narHash=sha256-PiUrztTiR4aVRC2fMdNcOWYWF1ojvqbrSUYmhtp3970%3D' (2024-12-09)
  → 'github:lilyinstarlight/nixos-cosmic/ad6f64f6512957048bdfd21be5f4ed54c8a53f37?narHash=sha256-uYdtD2nAjT55fXv8EW4TcItKFU1ugoZkFke4WSPxVs4%3D' (2024-12-12)
• Updated input 'nixos-cosmic/nixpkgs-stable':
    'github:NixOS/nixpkgs/4dc2fc4e62dbf62b84132fe526356fbac7b03541?narHash=sha256-FillH0qdWDt/nlO6ED7h4cmN%2BG9uXwGjwmCnHs0QVYM%3D' (2024-12-05)
  → 'github:NixOS/nixpkgs/a0f3e10d94359665dba45b71b4227b0aeb851f8e?narHash=sha256-KWwINTQelKOoQgrXftxoqxmKFZb9pLVfnRvK270nkVk%3D' (2024-12-10)
• Updated input 'nixos-cosmic/rust-overlay':
    'github:oxalica/rust-overlay/430c8b054e45ea44fd2c9521a378306ada507a6c?narHash=sha256-tIML2axjm4AnlKP29upVJxzBpj4Cy4ak%2BPKonqQtXmc%3D' (2024-12-08)
  → 'github:oxalica/rust-overlay/d0483df44ddf0fd1985f564abccbe568e020ddf2?narHash=sha256-8GXR9kC07dyOIshAyfZhG11xfvBRSZzYghnZ2weOKJU%3D' (2024-12-11)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>