flake.lock: Update (#51)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/83fb6c028368e465cd19bb127b86f971a5e41ebc?narHash=sha256-rz30HrFYCHiWEBCKHMffHbMdWJ35hEkcRVU0h7ms3x0%3D' (2024-11-07)
  → 'github:NixOS/nixpkgs/c21b77913ea840f8bcf9adf4c41cecc2abffd38d?narHash=sha256-XUO0JKP1hlww0d7mm3kpmIr4hhtR4zicg5Wwes9cPMg%3D' (2024-11-15)
• Updated input 'system-manager':
    'github:numtide/system-manager/92a303a6ac3f6bc95dd6c00118182e948c1bf28d?narHash=sha256-rSPKFTTQc17fsZXQKCuUdgT6StZ5Pg2fqIYMZT/EoC4%3D' (2024-11-09)
  → 'github:numtide/system-manager/19f20fe6e4a8df8473ca4da0e8d70543e97d868b?narHash=sha256-nzJYpa8fUVzd9Ej/AWrFDO/ZANaI6r5bK1zxayHJJRg%3D' (2024-11-13)

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