automated: Update flake.lock

- The following Nix Flake inputs were updated:

```
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d3c42f187194c26d9f0309a8ecc469d6c878ce33?narHash=sha256-cHar1vqHOOyC7f1%2BtVycPoWTfKIaqkoe1Q6TnKzuti4%3D' (2024-12-17)
  → 'github:NixOS/nixpkgs/634fd46801442d760e09493a794c4f15db2d0cbb?narHash=sha256-NYVcA06%2BblsLG6wpAbSPTCyLvxD/92Hy4vlY9WxFI1M%3D' (2024-12-27)
```

Auto-generated by [update.yml][1] with the help of
[create-pull-request][2].

[1]: https://forgejo.stefka.eu/jiriks74/nix.nvim/src/branch/main/.github/workflows/update.yml
[2]: https://forgejo.stefka.eu/jiriks74/create-pull-request

flake.lock

@@ -181,11 +181,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1734424634,
-        "narHash": "sha256-cHar1vqHOOyC7f1+tVycPoWTfKIaqkoe1Q6TnKzuti4=",
+        "lastModified": 1735291276,
+        "narHash": "sha256-NYVcA06+blsLG6wpAbSPTCyLvxD/92Hy4vlY9WxFI1M=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d3c42f187194c26d9f0309a8ecc469d6c878ce33",
+        "rev": "634fd46801442d760e09493a794c4f15db2d0cbb",
         "type": "github"
       },
       "original": {