flake.lock: Update

Flake lock file updates:

```
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/26d499fc9f1d567283d5d56fcf367edd815dba1d' (2025-04-12)
  → 'github:nixos/nixpkgs/5630cf13cceac06cefe9fc607e8dfa8fb342dde3' (2025-04-24)
• Updated input 'nixpkgs-unstable':
    'github:nixos/nixpkgs/b024ced1aac25639f8ca8fdfc2f8c4fbd66c48ef' (2025-04-17)
  → 'github:nixos/nixpkgs/f771eb401a46846c1aebd20552521b233dd7e18b' (2025-04-24)
```

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1745279238,
-        "narHash": "sha256-AQ7M9wTa/Pa/kK5pcGTgX/DGqMHyzsyINfN7ktsI7Fo=",
+        "lastModified": 1745487689,
+        "narHash": "sha256-FQoi3R0NjQeBAsEOo49b5tbDPcJSMWc3QhhaIi9eddw=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "9684b53175fc6c09581e94cc85f05ab77464c7e3",
+        "rev": "5630cf13cceac06cefe9fc607e8dfa8fb342dde3",
         "type": "github"
       },
       "original": {
@@ -36,11 +36,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1745234285,
-        "narHash": "sha256-GfpyMzxwkfgRVN0cTGQSkTC0OHhEkv3Jf6Tcjm//qZ0=",
+        "lastModified": 1745526057,
+        "narHash": "sha256-ITSpPDwvLBZBnPRS2bUcHY3gZSwis/uTe255QgMtTLA=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c11863f1e964833214b767f4a369c6e6a7aba141",
+        "rev": "f771eb401a46846c1aebd20552521b233dd7e18b",
         "type": "github"
       },
       "original": {