chore(example): Update share-services/northwind/flake.lock

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3f84a279f1a6290ce154c5531378acc827836fbb?narHash=sha256-u1fA0DYQYdeG%2B5kDm1bOoGcHtX0rtC7qs2YA2N1X%2B%2BI%3D' (2024-06-13)
  → 'github:nixos/nixpkgs/90338afd6177fc683a04d934199d693708c85a3b?narHash=sha256-%2B1xgeIow4gJeiwo4ETvMRvWoircnvb0JOt7NS9kUhoM%3D' (2024-06-21)
• Updated input 'services-flake':
    'github:juspay/services-flake/107e8f43fb0453105d161e80fbc485d7b19eb401?narHash=sha256-RpMH7512W%2BvI4/h%2B/TO%2BjEu0gXZ9mhdoLdu4pi8mtxs%3D' (2024-06-15)
  → 'github:juspay/services-flake/c371cd53829e973a7dd0d065d183c68b26203c27?narHash=sha256-BHiV/z8pufVLi7ibDXbkYWBQh%2BP2fKyutp%2Bch8%2BiRPc%3D' (2024-06-21)