flake.lock: Update

Flake lock file updates:

• Updated input 'nixos-amis':
    'https://api.flakehub.com/f/pinned/NixOS/amis/0.1.283%2Brev-6407dd881ab52101dbef7c49bc4bc56c56f3da32/01993f25-ff0b-730a-8978-2e03e6f81c3f/source.tar.gz?narHash=sha256-rp9r9MUkWcU2lDrwmtpw8sHo1%2BWw7ICExNow0ovPlFM%3D' (2025-09-12)
  → 'https://api.flakehub.com/f/pinned/NixOS/amis/0.1.286%2Brev-5eb6439688edcfd2a15cea7af51a5bbec8a3ca72/019952a4-f30b-710d-a6e5-bc2f3f07e751/source.tar.gz?narHash=sha256-Sq16Xet5tobe8ZEUmI3lXLZpnefe4nhZa3Zohe8hUlQ%3D' (2025-09-16)
• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/nixos/nixpkgs/0.1.861038%2Brev-c23193b943c6c689d70ee98ce3128239ed9e32d1/01994596-722e-716c-b0eb-e6b07d4de75b/source.tar.gz?narHash=sha256-hLEO2TPj55KcUFUU1vgtHE9UEIOjRcH/4QbmfHNF820%3D' (2025-09-13)
  → 'https://api.flakehub.com/f/pinned/nixos/nixpkgs/0.1.864002%2Brev-8eaee110344796db060382e15d3af0a9fc396e0e/01996678-f0d1-77fc-b2c3-9c3d83d401d2/source.tar.gz?narHash=sha256-iCGWf/LTy%2BaY0zFu8q12lK8KuZp7yvdhStehhyX1v8w%3D' (2025-09-19)

Author: github-actions[bot]