flake.lock: Update

Flake lock file updates:

• Updated input 'hyprland':
    'git+https://github.com/hyprwm/Hyprland?ref=refs/heads/main&rev=4cdddcfe466cb21db81af0ac39e51cc15f574da9&submodules=1' (2024-05-14)
  → 'git+https://github.com/hyprwm/Hyprland?ref=refs/heads/main&rev=94c20a186372aace78b188842848b873eb3ebbd7&submodules=1' (2024-05-14)
• Updated input 'hyprland-plugins':
    'github:hyprwm/hyprland-plugins/c2c70332a173c93b568ba41a5bb17c66db58d95e' (2024-05-13)
  → 'github:hyprwm/hyprland-plugins/c28d1011f4868c1a1ee80b10d9ee79900686df82' (2024-05-14)