flake.lock: Update (#923)

Flake lock file updates:

• Updated input 'nixos-infra':
    'github:NixOS/infra/527da27d0b93ba57581b861dd53398b494194c12?narHash=sha256-1E%2BnMpxYsnya3HYwx3Q3An4f4OX6AFClJUZfXa/A%2B68%3D' (2025-04-26)
  → 'github:NixOS/infra/59f6670f2ef35c66c78c05edd487eeb701d2f5f4?narHash=sha256-zp%2B318bDhi4/3rLk6uv8hWxQAbutoYMXk5B4Wzws02g%3D' (2025-05-03)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/f771eb401a46846c1aebd20552521b233dd7e18b?narHash=sha256-ITSpPDwvLBZBnPRS2bUcHY3gZSwis/uTe255QgMtTLA%3D' (2025-04-24)
  → 'github:NixOS/nixpkgs/7a2622e2c0dbad5c4493cb268aba12896e28b008?narHash=sha256-MHmBH2rS8KkRRdoU/feC/dKbdlMkcNkB5mwkuipVHeQ%3D' (2025-05-03)

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

Author: github-actions[bot]