flake.lock: Update (#578)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/825479c345a7f806485b7f00dbe3abb50641b083?narHash=sha256-nU6AezEX4EuahTO1YopzueAXfjFfmCHylYEFCagduHU%3D' (2025-01-24)
  → 'github:NixOS/nixpkgs/852ff1d9e153d8875a83602e03fdef8a63f0ecf8?narHash=sha256-Zf0hSrtzaM1DEz8//%2BXs51k/wdSajticVrATqDrfQjg%3D' (2025-01-26)
• Updated input 'nixvim':
    'github:nix-community/nixvim/d7df58321110d3b0e12a829bbd110db31ccd34b1?narHash=sha256-VkK73VRVgvSQOPw9qx9HzvbulvUM9Ae4nNd3xNP%2BpkI%3D' (2025-01-25)
  → 'github:nix-community/nixvim/8e5422bf3e76f410b97d2da640d0829e87657de9?narHash=sha256-PBF4R%2ByQt5Sls7CsA9Miwx28XtOP/yqaqejZ3RKSes0%3D' (2025-01-26)
• Updated input 'nixvim/nuschtosSearch':
    'github:NuschtOS/search/570cc17bbc25650eb7d69e4fcda8cfd2f1656922?narHash=sha256-nH3zK2ki0fd5o5qvbGHxukE4qnOLJa1uCzoDObG5vrE%3D' (2025-01-20)
  → 'github:NuschtOS/search/f91a0ac0f4ecf0ad1d1d88140f66520dae6ce4bd?narHash=sha256-LAppb%2BsftyvJbPdrBG1uN9GYWHz6q7bUpkpDjljcSRo%3D' (2025-01-25)

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