automated: Update flake.lock

- The following Nix Flake inputs were updated:

```
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/b024ced1aac25639f8ca8fdfc2f8c4fbd66c48ef?narHash=sha256-fusHbZCyv126cyArUwwKrLdCkgVAIaa/fQJYFlCEqiU%3D' (2025-04-17)
  → 'github:NixOS/nixpkgs/dda3dcd3fe03e991015e9a74b22d35950f264a54?narHash=sha256-Ua0drDHawlzNqJnclTJGf87dBmaO/tn7iZ%2BTCkTRpRc%3D' (2025-05-08)
```

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": 1746141548,
+        "lastModified": 1746663147,
-        "narHash": "sha256-IgBWhX7A2oJmZFIrpRuMnw5RAufVnfvOgHWgIdds+hc=",
+        "narHash": "sha256-Ua0drDHawlzNqJnclTJGf87dBmaO/tn7iZ+TCkTRpRc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f02fddb8acef29a8b32f10a335d44828d7825b78",
+        "rev": "dda3dcd3fe03e991015e9a74b22d35950f264a54",
         "type": "github"
       },
       "original": {