chore(lockfile): update flake.lock

Flake lock file updates:

• Updated input 'home-manager':
    'github:nix-community/home-manager/76d0c31fce2aa0c71409de953e2f9113acd5b656?narHash=sha256-gvjG95TCnUVJkvQvLMlnC4NqiqFyBdJk3o8/RwuHeaU%3D' (2025-06-28)
  → 'github:nix-community/home-manager/870883ba11ba1c84f756c0c1f9fa74cdb2a16c1e?narHash=sha256-OxGcFcQdfOK8veZkPdQuqXIotFYiy4sBQB58dMNLeHY%3D' (2025-10-18)
• Updated input 'nixvim':
    'github:nix-community/nixvim/51edc33c9763e486beacf6a066ae41a3c18827fa?narHash=sha256-GFbRW1QCBNK/0di2Dj0WZJxdN%2BEZgTTn6gm7af4/r9s%3D' (2025-09-09)
  → 'github:nix-community/nixvim/f8c32d10944cf2d0e16f6edfefba0362e7c61731?narHash=sha256-UogjJKJNFLWDZ6paQGvU0bv0WSXG1ievweOma9s4UuA%3D' (2025-10-18)
• Updated input 'nixvim/nuschtosSearch':
    'github:NuschtOS/search/5feeaeefb571e6ca2700888b944f436f7c05149b?narHash=sha256-8QX7Ab5CcICp7zktL47VQVS%2BQeaU4YDNAjzty7l7TQE%3D' (2025-09-01)
  → 'github:NuschtOS/search/7d4c0fc4ffe3bd64e5630417162e9e04e64b27a4?narHash=sha256-igrxT%2B/MnmcftPOHEb%2BXDwAMq3Xg1Xy7kVYQaHhPlAg%3D' (2025-09-23)

Author: anakmagang