flake.lock: Update

Flake lock file updates:

• Updated input 'CHaP':
    'github:input-output-hk/cardano-haskell-packages/b0a0e3b0775f3536867debe4c3d4622d76667d41' (2024-01-10)
  → 'github:input-output-hk/cardano-haskell-packages/cf30b3e3f70a17d4305371b6370555650e657be3' (2024-01-18)
• Updated input 'hackage-nix':
    'github:input-output-hk/hackage.nix/25d0729a1c56fd18cf7d14f88dd8f0fef474a7b2' (2024-01-14)
  → 'github:input-output-hk/hackage.nix/31d4fed569912819adbf66b580489b45dc80a29a' (2024-01-21)
• Updated input 'haskell-nix':
    'github:input-output-hk/haskell.nix/f51dc25e108a970ffb476289e8cc7be9514034ec' (2024-01-14)
  → 'github:input-output-hk/haskell.nix/2a31673a97ed3efbae9835ea7334528d2bc4b6ab' (2024-01-21)
• Added input 'haskell-nix/hls-2.5':
    'github:haskell/haskell-language-server/27f8c3d3892e38edaef5bea3870161815c4d014c' (2023-11-27)
• Added input 'haskell-nix/hls-2.6':
    'github:haskell/haskell-language-server/6e0b342fa0327e628610f2711f8c3e4eaaa08b1e' (2024-01-15)
• Updated input 'haskell-nix/stackage':
    'github:input-output-hk/stackage.nix/19f008b1c630f0408f45e349a40e6585f9f8b298' (2024-01-14)
  → 'github:input-output-hk/stackage.nix/8adfc78e62d3dbc3498a03579a50f3cf70cd4328' (2024-01-21)