flake.lock: Update

Flake lock file updates:

• Updated input 'advisory-db':
    'github:rustsec/advisory-db/6901f3c' (2025-11-29)
  → 'github:rustsec/advisory-db/e39023c' (2026-01-10)
• Updated input 'crane':
    'github:ipetkov/crane/d9e7531' (2025-11-23)
  → 'github:ipetkov/crane/2fb0332' (2026-01-07)
• Updated input 'flake-compat':
    'github:edolstra/flake-compat/f387cd2' (2025-10-27)
  → 'github:edolstra/flake-compat/5edf11c' (2025-12-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/24e915b' (2025-11-28)
  → 'github:NixOS/nixpkgs/3146c6a' (2026-01-10)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/4f5a90b' (2025-11-29)
  → 'github:oxalica/rust-overlay/312b437' (2026-01-10)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/5b4ee75' (2025-11-12)
  → 'github:numtide/treefmt-nix/0c445aa' (2026-01-10)
• Updated input 'treefmt-nix/nixpkgs':
    'github:nixos/nixpkgs/d5faa84' (2025-10-23)
  → 'github:nixos/nixpkgs/16c7794' (2026-01-02)

Author: github-actions[bot]