flake.lock: Update

Flake lock file updates:

• Updated input 'dream2nix':
    'github:nix-community/dream2nix/262198033e23e9ee832f0cc8133d38f07598f555' (2023-12-13)
  → 'github:nix-community/dream2nix/26a6c3a3405cdb2c2218cdc4e1e2bcf7a07af7ba' (2024-03-29)
• Updated input 'flake-utils':
    'github:numtide/flake-utils/ff7b65b44d01cf9ba6a71320833626af21126384' (2023-09-12)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/886c9aee6ca9324e127f9c2c4e6f68c2641c8256' (2023-12-18)
  → 'github:NixOS/nixpkgs/807c549feabce7eddbf259dbdcec9e0600a0660d' (2024-03-29)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/cbdf3e5bb205ff2ca165fe661fbd6d885cbd0106' (2024-02-26)
  → 'github:oxalica/rust-overlay/d45d957dc3c48792af7ce58eec5d84407655e8fa' (2024-04-02)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/e19071f9958c8da4f4347d3d78790d97e98ba22f' (2023-12-02)
  → 'github:Mic92/sops-nix/99b1e37f9fc0960d064a7862eb7adfb92e64fa10' (2024-03-31)
• Updated input 'sops-nix/nixpkgs-stable':
    'github:NixOS/nixpkgs/dfb95385d21475da10b63da74ae96d89ab352431' (2023-11-25)
  → 'github:NixOS/nixpkgs/2b4e3ca0091049c6fbb4908c66b05b77eaef9f0c' (2024-03-30)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/e82f32aa7f06bbbd56d7b12186d555223dc399d1' (2023-11-12)
  → 'github:numtide/treefmt-nix/49dc4a92b02b8e68798abd99184f228243b6e3ac' (2024-04-01)