flake.lock: Update

Flake lock file updates:

• Updated input 'CHaP':
    'github:intersectmbo/cardano-haskell-packages/4a6a3769c8cc8297ae8722e51fa5a4700b2db759?narHash=sha256-RQpTHF6VDPWELM4MHQahZrpEtv6ZxSx8oceWGAzJKco%3D' (2025-07-01)
  → 'github:intersectmbo/cardano-haskell-packages/c877742df9822f85b0be5bd105a5f2c635f29a30?narHash=sha256-cC5qIRqNIt6bimx26CsgHpgSlb8He7wKrm4TYgKF%2BCY%3D' (2025-09-18)
• Updated input 'hackageNix':
    'github:input-output-hk/hackage.nix/1df55daef81b543cf3ccab4b1a5a536e32d8ce2a?narHash=sha256-DwjXWJqd3%2BUhvx1OewJDMGxtny20vQvRF4iB%2BH8a3fs%3D' (2025-06-26)
  → 'github:input-output-hk/hackage.nix/b0571807df494c013d50bd43492b3b66dcd73bbf?narHash=sha256-rKf7BKbQ1e6fUETPv3Dr%2BdjvS%2Bl02F7jnUW397XjaCs%3D' (2025-09-20)

Author: github-actions[bot]