automated: Update flake.lock

- The following Nix Flake inputs were updated:

```
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/bffc22eb12172e6db3c5dde9e3e5628f8e3e7912?narHash=sha256-8YVQ9ZbSfuUk2bUf2KRj60NRraLPKPS0Q4QFTbc%2Bc2c%3D' (2025-01-08)
  → 'github:NixOS/nixpkgs/550e11f27ba790351d390d9eca3b80ad0f0254e7?narHash=sha256-U3SNq%2BwaitGIotmgg/Et3J7o4NvUtP2gb2VhME5QXiw%3D' (2025-02-06)
```

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": 1736344531,
+        "lastModified": 1738824222,
-        "narHash": "sha256-8YVQ9ZbSfuUk2bUf2KRj60NRraLPKPS0Q4QFTbc+c2c=",
+        "narHash": "sha256-U3SNq+waitGIotmgg/Et3J7o4NvUtP2gb2VhME5QXiw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "bffc22eb12172e6db3c5dde9e3e5628f8e3e7912",
+        "rev": "550e11f27ba790351d390d9eca3b80ad0f0254e7",
         "type": "github"
       },
       "original": {