flake.lock: Update

Flake lock file updates:

• Updated input 'dream2nix':
    'github:nix-community/dream2nix/262198033e23e9ee832f0cc8133d38f07598f555' (2023-12-13)
  → 'github:nix-community/dream2nix/d623e6ec2140ef9333b0387c9fca7e4d35071895' (2024-03-22)
• 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/20bc93ca7b2158ebc99b8cef987a2173a81cde35' (2024-03-23)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/cbdf3e5bb205ff2ca165fe661fbd6d885cbd0106' (2024-02-26)
  → 'github:oxalica/rust-overlay/6529a7975b893c17318cbdd351c771cb8d2c1dcb' (2024-03-23)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/e19071f9958c8da4f4347d3d78790d97e98ba22f' (2023-12-02)
  → 'github:Mic92/sops-nix/83b68a0e8c94b72cdd0a6e547a14ca7eb1c03616' (2024-03-17)
• Updated input 'sops-nix/nixpkgs-stable':
    'github:NixOS/nixpkgs/dfb95385d21475da10b63da74ae96d89ab352431' (2023-11-25)
  → 'github:NixOS/nixpkgs/6dc11d9859d6a18ab0c5e5829a5b8e4810658de3' (2024-03-16)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/e82f32aa7f06bbbd56d7b12186d555223dc399d1' (2023-11-12)
  → 'github:numtide/treefmt-nix/7ee5aaac63c30d3c97a8c56efe89f3b2aa9ae564' (2024-03-18)