build(nix): update dependencies

• Updated input 'fenix':
    'github:nix-community/fenix/8ac78ff' (2026-03-12)
  → 'github:nix-community/fenix/8124451' (2026-03-13)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/9dcb002' (2026-03-08)
  → 'github:nixos/nixpkgs/fe416aa' (2026-03-12)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/8ed3cca' (2026-03-11)
  → 'github:rust-lang/rust-analyzer/6254616' (2026-03-12)
• Updated input 'nixify':
    'github:rvolosatovs/nixify/c60a0f1' (2026-03-11)
  → 'github:rvolosatovs/nixify/bcc5e78' (2026-03-13)
• Updated input 'nixify/advisory-db':
    'github:rustsec/advisory-db/8ad0045' (2026-03-10)
  → 'github:rustsec/advisory-db/a38e165' (2026-03-11)
• Updated input 'nixify/nixpkgs-darwin':
    'github:nixos/nixpkgs/397b2b9' (2026-03-09)
  → 'github:nixos/nixpkgs/a855687' (2026-03-12)
• Updated input 'nixify/nixpkgs-nixos':
    'github:nixos/nixpkgs/44bae27' (2026-03-09)
  → 'github:nixos/nixpkgs/0590cd3' (2026-03-11)
• Updated input 'nixify/rust-overlay':
    'github:oxalica/rust-overlay/1924b46' (2026-03-10)
  → 'github:oxalica/rust-overlay/2b18fe4' (2026-03-12)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/b6067cc' (2026-03-11)
  → 'github:NixOS/nixpkgs/7569023' (2026-03-11)

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Author: github-actions[bot]