flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/4faa5f5321320e49a78ae7848582f684d64783e9?narHash=sha256-QlL8slIgc16W5UaI3w7xHQEP%2BQmv/6vSNTpoZrrSlbk%3D' (2025-05-27)
  → 'github:nixos/nixpkgs/96ec055edbe5ee227f28cdbc3f1ddf1df5965102?narHash=sha256-7doLyJBzCllvqX4gszYtmZUToxKvMUrg45EUWaUYmBg%3D' (2025-05-28)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/4bf1892eb81113e868efe67982b64f1da15c8c5a?narHash=sha256-veMuFa9cq/XgUXp1S57oC8K0TIw3XyZWL2jIyGWlW0c%3D' (2025-05-29)
  → 'github:oxalica/rust-overlay/405ef13a5b80a0a4d4fc87c83554423d80e5f929?narHash=sha256-k0nhPtkVDQkVJckRw6fGIeeDBktJf1BH0i8T48o7zkk%3D' (2025-05-30)

Author: littlenano