flake.lock: Update (#1059)

Flake lock file updates:

• Updated input 'nixos-infra':
    'github:NixOS/infra/fbcee6dff275ca6d929aff117fac99a12443a946?narHash=sha256-RQpvOvvCCDLE13uHXFLsQU7lf0OIVIitNLVUI8xB0TQ%3D' (2025-10-10)
  → 'github:NixOS/infra/85a21b518d7dae68cb8309d7eb93ecf064764c04?narHash=sha256-XG4d9wXQ4HytME1my2U0VRlo2G66ZOY3wwofFhqi1/c%3D' (2025-10-18)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/0b4defa2584313f3b781240b29d61f6f9f7e0df3?narHash=sha256-Oncbh0UmHjSlxO7ErQDM3KM0A5/Znfofj2BSzlHLeVw%3D' (2025-10-09)
  → 'github:NixOS/nixpkgs/544961dfcce86422ba200ed9a0b00dd4b1486ec5?narHash=sha256-EVAqOteLBFmd7pKkb0%2BFIUyzTF61VKi7YmvP1tw4nEw%3D' (2025-10-15)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]