feat: run nix flake update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/035f8c0853c2977b24ffc4d0a42c74f00b182cd8?narHash=sha256-YnHJJ19wqmibLQdUeq9xzE6CjrMA568KN/lFPuSVs4I%3D' (2025-01-23)
  → 'github:NixOS/nixpkgs/59e618d90c065f55ae48446f307e8c09565d5ab0?narHash=sha256-B/7Y1v4y%2BmsFFBW1JAdFjNvVthvNdJKiN6EGRPnqfno%3D' (2025-01-29)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/015d461c16678fc02a2f405eb453abb509d4e1d4?narHash=sha256-j9IdflJwRtqo9WpM0OfAZml47eBblUHGNQTe62OUqTw%3D' (2025-01-20)
  → 'github:Mic92/sops-nix/4c1251904d8a08c86ac6bc0d72cc09975e89aef7?narHash=sha256-wkwYJc8cKmmQWUloyS9KwttBnja2ONRuJQDEsmef320%3D' (2025-01-31)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/f2cc121df15418d028a59c9737d38e3a90fbaf8f?narHash=sha256-5An1wq5U8sNycOBBg3nsDDgpwBmR9liOpDGlhliA6Xo%3D' (2025-01-21)
  → 'github:numtide/treefmt-nix/bebf27d00f7d10ba75332a0541ac43676985dea3?narHash=sha256-j6jC12vCFsTGDmY2u1H12lMr62fnclNjuCtAdF1a4Nk%3D' (2025-01-28)

Author: actions-user