automated: Update flake.lock

- The following Nix Flake inputs were updated:

```
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3566ab7246670a43abd2ffa913cc62dad9cdf7d5?narHash=sha256-AKU6qqskl0yf2%2BJdRdD0cfxX4b9x3KKV5RqA6wijmPM%3D' (2024-12-13)
  → 'github:nixos/nixpkgs/d3c42f187194c26d9f0309a8ecc469d6c878ce33?narHash=sha256-cHar1vqHOOyC7f1%2BtVycPoWTfKIaqkoe1Q6TnKzuti4%3D' (2024-12-17)
```

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

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1734119587,
-        "narHash": "sha256-AKU6qqskl0yf2+JdRdD0cfxX4b9x3KKV5RqA6wijmPM=",
+        "lastModified": 1734424634,
+        "narHash": "sha256-cHar1vqHOOyC7f1+tVycPoWTfKIaqkoe1Q6TnKzuti4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3566ab7246670a43abd2ffa913cc62dad9cdf7d5",
+        "rev": "d3c42f187194c26d9f0309a8ecc469d6c878ce33",
         "type": "github"
       },
       "original": {