build(nix): update dependencies

• Updated input 'fenix':
    'github:nix-community/fenix/64407dd' (2026-03-10)
  → 'github:nix-community/fenix/42f953f' (2026-03-11)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/16e4436' (2026-03-09)
  → 'github:rust-lang/rust-analyzer/e0269ce' (2026-03-10)
• Updated input 'nixify':
    'github:rvolosatovs/nixify/77fd871' (2026-03-10)
  → 'github:rvolosatovs/nixify/c60a0f1' (2026-03-11)
• Updated input 'nixify/advisory-db':
    'github:rustsec/advisory-db/bd3f015' (2026-03-09)
  → 'github:rustsec/advisory-db/8ad0045' (2026-03-10)
• Updated input 'nixify/nixpkgs-nixos':
    'github:nixos/nixpkgs/71caefc' (2026-03-06)
  → 'github:nixos/nixpkgs/44bae27' (2026-03-09)
• Updated input 'nixify/rust-overlay':
    'github:oxalica/rust-overlay/3c06fdb' (2026-03-09)
  → 'github:oxalica/rust-overlay/1924b46' (2026-03-10)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/608d0ca' (2026-03-08)
  → 'github:NixOS/nixpkgs/e607cb5' (2026-03-10)

Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]