flake.lock: Update (#153)

Flake lock file updates:

• Updated input 'home-manager':
    'github:nix-community/home-manager/49ca96b' (2026-04-01)
  → 'github:nix-community/home-manager/0d02ec1' (2026-04-05)
• Updated input 'niri':
    'github:sodiboo/niri-flake/0e4df2c' (2026-04-01)
  → 'github:sodiboo/niri-flake/d61ac99' (2026-04-05)
• Updated input 'niri/niri-unstable':
    'github:YaLTeR/niri/8f48f56' (2026-03-27)
  → 'github:YaLTeR/niri/d1a0380' (2026-04-05)
• Updated input 'niri/nixpkgs':
    'github:NixOS/nixpkgs/8110df5' (2026-03-28)
  → 'github:NixOS/nixpkgs/6201e20' (2026-04-01)
• Updated input 'nixos-hardware':
    'github:NixOS/nixos-hardware/f4c4c2c' (2026-03-31)
  → 'github:NixOS/nixos-hardware/80afbd1' (2026-04-03)
• Updated input 'nixpkgs-unstable':
    'github:nixos/nixpkgs/8d029aa' (2026-04-01)
  → 'github:nixos/nixpkgs/5e11f7a' (2026-04-05)
• Updated input 'spicetify-nix':
    'github:Gerg-L/spicetify-nix/2bfdf55' (2026-03-29)
  → 'github:Gerg-L/spicetify-nix/ec8d730' (2026-04-05)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/71b125c' (2026-03-12)
  → 'github:numtide/treefmt-nix/7592596' (2026-04-02)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: bottd