chore(example/simple): Update flake.lock

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/af510d4a62d071ea13925ce41c95e3dec816c01d?narHash=sha256-ODYRm8zHfLTH3soTFWE452ydPYz2iTvr9T8ftDMUQ3E%3D' (2024-08-30)
  → 'github:hercules-ci/flake-parts/567b938d64d4b4112ee253b9274472dc3a346eb6?narHash=sha256-%2Bebgonl3NbiKD2UD0x4BszCZQ6sTfL4xioaM49o5B3Y%3D' (2024-09-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'https://github.com/NixOS/nixpkgs/archive/a5d394176e64ab29c852d03346c1fc9b0b7d33eb.tar.gz?narHash=sha256-uFf2QeW7eAHlYXuDktm9c25OxOyCoUOQmh5SZ9amE5Q%3D' (2024-08-01)
  → 'https://github.com/NixOS/nixpkgs/archive/356624c12086a18f2ea2825fed34523d60ccc4e3.tar.gz?narHash=sha256-Ss8QWLXdr2JCBPcYChJhz4xJm%2Bh/xjl4G0c0XlP6a74%3D' (2024-09-01)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/5629520edecb69630a3f4d17d3d33fc96c13f6fe?narHash=sha256-CHgumPZaC7z%2BWYx72WgaLt2XF0yUVzJS60rO4GZ7ytY%3D' (2024-08-31)
  → 'github:nixos/nixpkgs/9bb1e7571aadf31ddb4af77fc64b2d59580f9a39?narHash=sha256-Yd0FK9SkWy%2BZPuNqUgmVPXokxDgMJoGuNpMEtkfcf84%3D' (2024-09-05)
• Updated input 'services-flake':
    'github:juspay/services-flake/dcb5db918288ccb5319f2f78a69e851559103c0a?narHash=sha256-xJweq5KMqqbCfXWnJg3QEfHFUN5/%2Bd3Fx53t20FBDAI%3D' (2024-08-27)
  → 'github:juspay/services-flake/fbede4cbfd0f432ddb41e4cbe34acf93b76851a0?narHash=sha256-05jRFTaESYbUb6%2BC1/pstarDGZLCrrwtM8%2BNJwSL4Us%3D' (2024-09-07)