flake.lock: Update

Flake lock file updates:

• Updated input 'determinate-main-dnixd':
    'https://install.determinate.systems/determinate-nixd/branch/main/x86_64-linux'
  → 'https://install.determinate.systems/determinate-nixd/branch/main/x86_64-linux'
• Updated input 'determinate-main-nixsrc':
    'github:DeterminateSystems/nix-src/370987f' (2026-01-23)
  → 'github:DeterminateSystems/nix-src/7319060' (2026-01-23)
• Updated input 'ghostty':
    'github:ghostty-org/ghostty/4acd339' (2026-01-23)
  → 'github:ghostty-org/ghostty/f479210' (2026-01-24)
• Updated input 'home-manager':
    'github:nix-community/home-manager/d055b30' (2026-01-23)
  → 'github:nix-community/home-manager/082a4cd' (2026-01-23)
• Updated input 'nixpkgs-unstable':
    'github:nixos/nixpkgs/ed142ab' (2026-01-20)
  → 'github:nixos/nixpkgs/5232575' (2026-01-24)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/470ee44' (2026-01-23)
  → 'github:oxalica/rust-overlay/22da29e' (2026-01-24)

Author: colemickens