flake.lock: Update

Flake lock file updates:

• Updated input 'hyprland':
    'git+https://github.com/hyprwm/Hyprland?ref=refs/heads/main&rev=6a988d9276691957f1d9138f93c2209b580cad13&submodules=1' (2024-05-08)
  → 'git+https://github.com/hyprwm/Hyprland?ref=refs/heads/main&rev=e4e84064f2d07810e0c150bce1369a0a00503e9a&submodules=1' (2024-05-08)
• Updated input 'nur':
    'github:nix-community/NUR/b6cf1036905179e579c78bd0d82202ee907e250f' (2024-05-08)
  → 'github:nix-community/NUR/6580e34800c76147aa5d61cf598123f0de72971c' (2024-05-08)