flake.lock: Update (#451)

Flake lock file updates:

• Updated input 'homebrew-cask':
    'github:homebrew/homebrew-cask/fdd0ddfee0914825e4ecaabcfca46b4e2fb86572?narHash=sha256-%2BNzq2SXR5OQfha%2BswUVzW7RSrpcJVyfklcOSo4%2BiNiY%3D' (2026-04-15)
  → 'github:homebrew/homebrew-cask/434120cfdca0e4628c7087605e82e3db51bd0690?narHash=sha256-W4Hk131VgNH/S0pTI%2BUF6BVWb1Bf/xpSR7qw4Je0S9E%3D' (2026-04-16)
• Updated input 'homebrew-core':
    'github:homebrew/homebrew-core/42e53c459ceb650c5f0f8cdd201c3f57ad4054bc?narHash=sha256-0O17oU2ER28t1XLgNc6fAc4FApX4%2BIc07HfA5YdAVJw%3D' (2026-04-15)
  → 'github:homebrew/homebrew-core/45066f511925ac690a0cf54078cb633b8bc974a3?narHash=sha256-8GaQ8iiO1zy9o0tsjEzqz4G1gA9t/aoB%2B/7m3XD3GkQ%3D' (2026-04-16)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/4c1018dae018162ec878d42fec712642d214fdfa?narHash=sha256-ar3rofg%2BawPB8QXDaFJhJ2jJhu%2BKqN/PRCXeyuXR76E%3D' (2026-04-09)
  → 'github:NixOS/nixpkgs/4bd9165a9165d7b5e33ae57f3eecbcb28fb231c9?narHash=sha256-l/iNYDZ4bGOAFQY2q8y5OAfBBtrDAaPuRQqWaFHVRXM%3D' (2026-04-14)
• Updated input 'systems':
    'path:./flake.systems.nix'
  → 'path:./flake.systems.nix'

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: stackptr