chore(example): Update flake.lock

Flake lock file updates:

• Updated input 'haskell-flake':
    'github:srid/haskell-flake/555acccfd5a159cb5f9479cc8ff15ae275a60d21?narHash=sha256-%2BRV7luQhPTk%2BLkBuETRU6f8ppLXqhTmLCoSUG8GezIk%3D' (2025-02-10)
  → 'github:srid/haskell-flake/b40fcefa008ffa7205058f542a577cc218bec9a4?narHash=sha256-P8I3uARBkSra86d5lgTo7cK%2BET27zVee1BxWrym%2B9z8%3D' (2025-02-16)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/1128e89fd5e11bb25aedbfc287733c6502202ea9?narHash=sha256-3ebRdThRic9bHMuNi2IAA/ek9b32bsy8F5R4SvGTIog%3D' (2025-02-13)
  → 'github:nixos/nixpkgs/dad564433178067be1fbdfcce23b546254b6d641?narHash=sha256-vn285HxnnlHLWnv59Og7muqECNMS33mWLM14soFIv2g%3D' (2025-02-20)

Author: github-actions[bot]