flake.lock: Update

Flake lock file updates:

• Updated input 'dream2nix':
    'github:nix-community/dream2nix/32e62d56b0cba6cbc0283f9c4259d1486422014d' (2024-03-07)
  → 'github:nix-community/dream2nix/45ec75f4663a26093bd40a75b7366da558a01545' (2024-03-20)
• Updated input 'fenix':
    'github:nix-community/fenix/b06c3b4110bfb731d8b84b35cc5f7e00e63b37ed' (2024-03-16)
  → 'github:nix-community/fenix/0dd47e8403f6eb3311e47a6bc139be22206b1e38' (2024-03-21)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/d7ec7a5441190b4fde399b2ac3a8d9daaf062e1c' (2024-03-15)
  → 'github:rust-lang/rust-analyzer/5e276ae51c35eaa22411ba81a4c00457f32e6ab5' (2024-03-20)
• Updated input 'flake-utils':
    'github:numtide/flake-utils/d465f4819400de7c8d874d50b982301f28a84605' (2024-02-28)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/9df3e30ce24fd28c7b3e2de0d986769db5d6225d' (2024-03-06)
  → 'github:NixOS/nixpkgs/b06025f1533a1e07b6db3e75151caa155d1c7eb3' (2024-03-19)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/7fdb7a7a846dc1f407cd6b24af04a0b8d018c3de' (2024-03-07)
  → 'github:oxalica/rust-overlay/97596b54ac34ad8184ca1eef44b1ec2e5c2b5f9e' (2024-03-21)