chore(example): Update simple/flake.lock

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/5fd8536a9a5932d4ae8de52b7dc08d92041237fc?narHash=sha256-oOUdvPrO8CbupgDSaPou%2BJv6GL%2BuQA2QlE33D7OLzkM%3D' (2024-05-03)
  → 'github:nixos/nixpkgs/e4e7a43a9db7e22613accfeb1005cca1b2b1ee0d?narHash=sha256-FCi3R1MeS5bVp0M0xTheveP6hhcCYfW/aghSTPebYL4%3D' (2024-05-11)
• Updated input 'process-compose-flake':
    'github:Platonic-Systems/process-compose-flake/ee8cd505f08f6cd691930e70987a306b7726851b?narHash=sha256-pQIg3wrNBDdRiuhcVC8DFmTXK8GHtR%2BiV%2B5Gvsozx5s%3D' (2024-04-24)
  → 'github:Platonic-Systems/process-compose-flake/32c069e7ef436b4325ee36503cd02b2863eede53?narHash=sha256-kO8gcRHfuKIlsGmFoHUF4lD3CfrRBymIlG2R3OHBEjQ%3D' (2024-05-07)
• Updated input 'services-flake':
    'github:juspay/services-flake/8d64a960367e07f7d21fa890f77f56daabc5d8bd?narHash=sha256-kchvJP4Ih%2BZ/YG8Sd6CvbNMss9MCDlrt4sgTKL5czpY%3D' (2024-04-30)
  → 'github:juspay/services-flake/75a42b9e9ecd34e603e482d294d4526a560e31ec?narHash=sha256-%2BApfSR4XZ%2BIt%2BYVR9z2oYnkWsrsmcUKWJ9bqGuCe%2BBw%3D' (2024-05-09)