chore(nix): update `flake.lock`
Flake lock file updates:
• Updated input 'advisory-db':
'github:rustsec/advisory-db/eaf48e7' (2026-05-29)
→ 'github:rustsec/advisory-db/8fe151a' (2026-06-06)
• Updated input 'crane':
'github:ipetkov/crane/0532eb1' (2026-05-30)
→ 'github:ipetkov/crane/59a82a1' (2026-06-04)
• Updated input 'fenix':
'github:nix-community/fenix/2118601' (2026-05-30)
→ 'github:nix-community/fenix/6d8f78e' (2026-06-06)
• Updated input 'fenix/rust-analyzer-src':
'github:rust-lang/rust-analyzer/5ebf65c' (2026-05-29)
→ 'github:rust-lang/rust-analyzer/09b3315' (2026-06-05)
• Updated input 'nixpkgs':
'github:nixos/nixpkgs/25f5383' (2026-05-26)
→ 'github:nixos/nixpkgs/535f3e6' (2026-06-03)
• Updated input 'treefmt-nix':
'github:numtide/treefmt-nix/790751f' (2026-04-08)
→ 'github:numtide/treefmt-nix/db94781' (2026-05-31)