flake.lock: Update

Flake lock file updates:

• Updated input 'nix-gaming':
    'github:fufexan/nix-gaming/5dba7fd39730e14f3c54787df23c533dc98e1e0f?narHash=sha256-FB%2BtCte2nOOLI7i3YvHFZZsFWDjaq%2Bf5nn4wxt6akTQ%3D' (2024-04-22)
  → 'github:fufexan/nix-gaming/a8c2a0e160e1212c67724aa89a823b55d423d157?narHash=sha256-7oYv0EJ2iqL9MZiB7QRE63nHDVMuyTgukgYZDdjL8Kg%3D' (2024-04-26)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/f2d7a289c5a5ece8521dd082b81ac7e4a57c2c5c?narHash=sha256-Yd8KuOBpZ0Slau/NxFhMPJI0gBxeax0vq/FD0rqKwuQ%3D' (2024-04-21)
  → 'github:NixOS/nixpkgs/4c86138ce486d601d956a165e2f7a0fc029a03c1?narHash=sha256-68n3GBvlm1MIeJXadPzQ3v8Y9sIW3zmv8gI5w5sliC8%3D' (2024-04-26)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/49dc4a92b02b8e68798abd99184f228243b6e3ac?narHash=sha256-N3QDhoaX%2BpaWXHbEXZapqd1r95mdshxToGowtjtYkGI%3D' (2024-04-01)
  → 'github:numtide/treefmt-nix/c6aaf729f34a36c445618580a9f95a48f5e4e03f?narHash=sha256-Qv4RBm4LKuO4fNOfx9wl40W2rBbv5u5m%2BwhxRYUMiaA%3D' (2024-04-25)