flake.lock: Update

Flake lock file updates:

• Updated input 'advisory-db':
    'github:rustsec/advisory-db/7573f55ba337263f61167dbb0ea926cdc7c8eb5d?narHash=sha256-il%2BCAqChFIB82xP6bO43dWlUVs%2BNlG7a4g8liIP5HcI%3D' (2025-06-17)
  → 'github:rustsec/advisory-db/90cc8453773cd356e9be0c728fdf3f4e0553ad71?narHash=sha256-JiyBgKlETmlHFSVTvUjajKInIqVU3qRjo2DuFtoTE8c%3D' (2025-07-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/c860cf0b3a0829f0f6cf344ca8de83a2bbfab428?narHash=sha256-4E7wWftF1ExK5ZEDzj41%2B9mVgxtuRV3wWCId7QAYMAU%3D' (2025-07-04)
  → 'github:NixOS/nixpkgs/2a2130494ad647f953593c4e84ea4df839fbd68c?narHash=sha256-Q82Ms%2BFQmgOBkdoSVm%2BFBpuFoeUAffNerR5yVV7SgT8%3D' (2025-07-08)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/9e5e62a33a929a67a5427fb7324a6f583dced0b2?narHash=sha256-dYO5X5jK8bpQOeRAo8R5aUt6M/%2BJi1cZgstZI7SQ2IA%3D' (2025-07-05)
  → 'github:oxalica/rust-overlay/678296525a4cce249c608749b171d0b2ceb8b2ff?narHash=sha256-f2PMqtf61mWAM11QoIfGv3hjD2AsJrij4FCzftepuaE%3D' (2025-07-12)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/ac8e6f32e11e9c7f153823abc3ab007f2a65d3e1?narHash=sha256-0IEdQB1nS%2BuViQw4k3VGUXntjkDp7aAlqcxdewb/hAc%3D' (2025-06-26)
  → 'github:numtide/treefmt-nix/c9d477b5d5bd7f26adddd3f96cfd6a904768d4f9?narHash=sha256-19m7P4O/Aw/6%2BCzncWMAJu89JaKeMh3aMle1CNQSIwM%3D' (2025-07-09)

Author: github-actions[bot]