nix: Update flake.lock

Flake lock file updates:

• Updated input 'crane':
    'github:ipetkov/crane/6d015ea' (2026-05-06)
  → 'github:ipetkov/crane/59a82a1' (2026-06-04)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/d233902' (2026-05-15)
  → 'github:nixos/nixpkgs/9ae611a' (2026-06-10)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/61ec6a4' (2026-05-16)
  → 'github:oxalica/rust-overlay/5b929d8' (2026-06-13)

Author: github-actions[bot]