flake.lock: Update

Flake lock file updates:

• Updated input 'candid-src':
    'github:dfinity/candid/1725ea211e928a4dc18c4147d27ed5764f00df5c?narHash=sha256-7/aBuCJUtH5nofVfgyedqI6t7a21H%2B14kwmYOGFbO8g%3D' (2025-10-02)
  → 'github:dfinity/candid/4e8357d17198e53b4d426636a0b70d1433b40390?narHash=sha256-lRjdOwUF06g04qjUhFVU19sjYZooSHEZa3cKcpiZHYQ%3D' (2025-10-16)
• Updated input 'ic-wasm-src':
    'github:dfinity/ic-wasm/d61f15ea363eebb952195f57cf9c5db3b2cade21?narHash=sha256-PTwtdFVGGofm934tlikb2cNq932yuBjXYtN5TKXfwmg%3D' (2025-10-01)
  → 'github:dfinity/ic-wasm/10f1b5965c8c4b7fd1532734b60dcb2a2fcb2673?narHash=sha256-9vwXW4NTJzdwQUPk5%2BvHp0uWFJr6o3/Pj/wZ26gTyfM%3D' (2025-10-22)
• Updated input 'motoko-core-src':
    'github:dfinity/motoko-core/c49a060df3e066463d81664f27065238ca7cc23f?narHash=sha256-INchg3S6uo8qKUvShjHmGVhgKq2FdQkcYKJkE2GLDoY%3D' (2025-10-14)
  → 'github:dfinity/motoko-core/c707f40fe514bbde9a33869e71a86c6d36ce7e32?narHash=sha256-knLQ0jGi0OcZTEmhRFSaUjqQkrOJZ4eGKJhGc3o%2B8IE%3D' (2025-10-28)

Author: github-actions[bot]