chore(example): Update flake.lock

Flake lock file updates:

• Updated input 'haskell-flake':
    'github:srid/haskell-flake/6df12c6bbf5af89edea64184a62d08db9c92d43d?narHash=sha256-5JZMbyhI5qUTYDTpbJ1Tb7mmIcjXKd2gSTs75dMOWMk%3D' (2025-09-15)
  → 'github:srid/haskell-flake/c9782b539b75828df2c150d4b6c4cbe666f01c31?narHash=sha256-52Is8RAkC0moHMoLhCgatU0G%2B9dHdgboHY55fI04QjA%3D' (2025-09-23)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/12bd230118a1901a4a5d393f9f56b6ad7e571d01?narHash=sha256-aBGl3XEOsjWw6W3AHiKibN7FeoG73dutQQEqnd/etR8%3D' (2025-09-19)
  → 'github:nixos/nixpkgs/e3a3b32cc234f1683258d36c6232f150d57df015?narHash=sha256-hEIDTaIqvW1NMfaNgz6pjhZPZKTmACJmXxGr/H6isIg%3D' (2025-09-27)

Author: github-actions[bot]